CVE-2024-41041 (GCVE-0-2024-41041)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:31 – Updated: 2025-11-03 21:59
VLAI?
Title
udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().
Summary
In the Linux kernel, the following vulnerability has been resolved: udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port(). syzkaller triggered the warning [0] in udp_v4_early_demux(). In udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount of the looked-up sk and use sock_pfree() as skb->destructor, so we check SOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace period. Currently, SOCK_RCU_FREE is flagged for a bound socket after being put into the hash table. Moreover, the SOCK_RCU_FREE check is done too early in udp_v[46]_early_demux() and sk_lookup(), so there could be a small race window: CPU1 CPU2 ---- ---- udp_v4_early_demux() udp_lib_get_port() | |- hlist_add_head_rcu() |- sk = __udp4_lib_demux_lookup() | |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk)); `- sock_set_flag(sk, SOCK_RCU_FREE) We had the same bug in TCP and fixed it in commit 871019b22d1b ("net: set SOCK_RCU_FREE before inserting socket into hashtable"). Let's apply the same fix for UDP. [0]: WARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 Modules linked in: CPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 RIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599 Code: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe <0f> 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52 RSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c RDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001 RBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680 R13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e FS: 00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 PKRU: 55555554 Call Trace: <TASK> ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349 ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624 __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738 netif_receive_skb_internal net/core/dev.c:5824 [inline] netif_receive_skb+0x271/0x300 net/core/dev.c:5884 tun_rx_batched drivers/net/tun.c:1549 [inline] tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002 tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x76f/0x8d0 fs/read_write.c:590 ksys_write+0xbf/0x190 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x41/0x50 fs/read_write.c:652 x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fc44a68bc1f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48 RSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f R ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 7a67c4e47626e6daccda62888f8b096abb5d3940 (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 9f965684c57c3117cfd2f754dd3270383c529fba (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < a6db0d3ea6536e7120871e5448b3032570152ec6 (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < c5fd77ca13d657c6e99bf04f0917445e6a80231e (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 20ceae10623c3b29fdf7609690849475bcdebdb0 (git)
Affected: 6acc9b432e6714d72d7d77ec7c27f6f8358d0c71 , < 5c0b485a8c6116516f33925b9ce5b6104a6eadfd (git)
Create a notification for this product.
    Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.280 , ≤ 5.4.* (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.100 , ≤ 6.1.* (semver)
Unaffected: 6.6.41 , ≤ 6.6.* (semver)
Unaffected: 6.9.10 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:59:39.558Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-41041",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:23:13.757861Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:32:58.050Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/udp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7a67c4e47626e6daccda62888f8b096abb5d3940",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            },
            {
              "lessThan": "9f965684c57c3117cfd2f754dd3270383c529fba",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            },
            {
              "lessThan": "ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            },
            {
              "lessThan": "a6db0d3ea6536e7120871e5448b3032570152ec6",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            },
            {
              "lessThan": "c5fd77ca13d657c6e99bf04f0917445e6a80231e",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            },
            {
              "lessThan": "20ceae10623c3b29fdf7609690849475bcdebdb0",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            },
            {
              "lessThan": "5c0b485a8c6116516f33925b9ce5b6104a6eadfd",
              "status": "affected",
              "version": "6acc9b432e6714d72d7d77ec7c27f6f8358d0c71",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/udp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.280",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.100",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.41",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.280",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.222",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.163",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.100",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.41",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9.10",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\n\nsyzkaller triggered the warning [0] in udp_v4_early_demux().\n\nIn udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount\nof the looked-up sk and use sock_pfree() as skb-\u003edestructor, so we check\nSOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace\nperiod.\n\nCurrently, SOCK_RCU_FREE is flagged for a bound socket after being put\ninto the hash table.  Moreover, the SOCK_RCU_FREE check is done too early\nin udp_v[46]_early_demux() and sk_lookup(), so there could be a small race\nwindow:\n\n  CPU1                                 CPU2\n  ----                                 ----\n  udp_v4_early_demux()                 udp_lib_get_port()\n  |                                    |- hlist_add_head_rcu()\n  |- sk = __udp4_lib_demux_lookup()    |\n  |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk));\n                                       `- sock_set_flag(sk, SOCK_RCU_FREE)\n\nWe had the same bug in TCP and fixed it in commit 871019b22d1b (\"net:\nset SOCK_RCU_FREE before inserting socket into hashtable\").\n\nLet\u0027s apply the same fix for UDP.\n\n[0]:\nWARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\nModules linked in:\nCPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\nRIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\nCode: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u003c0f\u003e 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52\nRSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c\nRDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001\nRBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000\nR10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680\nR13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e\nFS:  00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349\n ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447\n NF_HOOK include/linux/netfilter.h:314 [inline]\n NF_HOOK include/linux/netfilter.h:308 [inline]\n ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569\n __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624\n __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738\n netif_receive_skb_internal net/core/dev.c:5824 [inline]\n netif_receive_skb+0x271/0x300 net/core/dev.c:5884\n tun_rx_batched drivers/net/tun.c:1549 [inline]\n tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002\n tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0x76f/0x8d0 fs/read_write.c:590\n ksys_write+0xbf/0x190 fs/read_write.c:643\n __do_sys_write fs/read_write.c:655 [inline]\n __se_sys_write fs/read_write.c:652 [inline]\n __x64_sys_write+0x41/0x50 fs/read_write.c:652\n x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\nRIP: 0033:0x7fc44a68bc1f\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48\nRSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f\nR\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T09:20:44.955Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba"
        },
        {
          "url": "https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a"
        },
        {
          "url": "https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6"
        },
        {
          "url": "https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e"
        },
        {
          "url": "https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd"
        }
      ],
      "title": "udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-41041",
    "datePublished": "2024-07-29T14:31:54.647Z",
    "dateReserved": "2024-07-12T12:17:45.623Z",
    "dateUpdated": "2025-11-03T21:59:39.558Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:39:56.185Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-41041\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:23:13.757861Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:13.801Z\"}}], \"cna\": {\"title\": \"udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"7a67c4e47626\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"9f965684c57c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"ddf516e50bf8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"a6db0d3ea653\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"c5fd77ca13d6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"20ceae10623c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6acc9b432e67\", \"lessThan\": \"5c0b485a8c61\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/udp.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.20\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.20\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"5.4.280\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.222\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.163\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.100\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.41\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.10\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/udp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7a67c4e47626e6daccda62888f8b096abb5d3940\"}, {\"url\": \"https://git.kernel.org/stable/c/9f965684c57c3117cfd2f754dd3270383c529fba\"}, {\"url\": \"https://git.kernel.org/stable/c/ddf516e50bf8a7bc9b3bd8a9831f9c7a8131a32a\"}, {\"url\": \"https://git.kernel.org/stable/c/a6db0d3ea6536e7120871e5448b3032570152ec6\"}, {\"url\": \"https://git.kernel.org/stable/c/c5fd77ca13d657c6e99bf04f0917445e6a80231e\"}, {\"url\": \"https://git.kernel.org/stable/c/20ceae10623c3b29fdf7609690849475bcdebdb0\"}, {\"url\": \"https://git.kernel.org/stable/c/5c0b485a8c6116516f33925b9ce5b6104a6eadfd\"}], \"x_generator\": {\"engine\": \"bippy-c9c4e1df01b2\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nudp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().\\n\\nsyzkaller triggered the warning [0] in udp_v4_early_demux().\\n\\nIn udp_v[46]_early_demux() and sk_lookup(), we do not touch the refcount\\nof the looked-up sk and use sock_pfree() as skb-\u003edestructor, so we check\\nSOCK_RCU_FREE to ensure that the sk is safe to access during the RCU grace\\nperiod.\\n\\nCurrently, SOCK_RCU_FREE is flagged for a bound socket after being put\\ninto the hash table.  Moreover, the SOCK_RCU_FREE check is done too early\\nin udp_v[46]_early_demux() and sk_lookup(), so there could be a small race\\nwindow:\\n\\n  CPU1                                 CPU2\\n  ----                                 ----\\n  udp_v4_early_demux()                 udp_lib_get_port()\\n  |                                    |- hlist_add_head_rcu()\\n  |- sk = __udp4_lib_demux_lookup()    |\\n  |- DEBUG_NET_WARN_ON_ONCE(sk_is_refcounted(sk));\\n                                       `- sock_set_flag(sk, SOCK_RCU_FREE)\\n\\nWe had the same bug in TCP and fixed it in commit 871019b22d1b (\\\"net:\\nset SOCK_RCU_FREE before inserting socket into hashtable\\\").\\n\\nLet\u0027s apply the same fix for UDP.\\n\\n[0]:\\nWARNING: CPU: 0 PID: 11198 at net/ipv4/udp.c:2599 udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nModules linked in:\\nCPU: 0 PID: 11198 Comm: syz-executor.1 Not tainted 6.9.0-g93bda33046e7 #13\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:udp_v4_early_demux+0x481/0xb70 net/ipv4/udp.c:2599\\nCode: c5 7a 15 fe bb 01 00 00 00 44 89 e9 31 ff d3 e3 81 e3 bf ef ff ff 89 de e8 2c 74 15 fe 85 db 0f 85 02 06 00 00 e8 9f 7a 15 fe \u003c0f\u003e 0b e8 98 7a 15 fe 49 8d 7e 60 e8 4f 39 2f fe 49 c7 46 60 20 52\\nRSP: 0018:ffffc9000ce3fa58 EFLAGS: 00010293\\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8318c92c\\nRDX: ffff888036ccde00 RSI: ffffffff8318c2f1 RDI: 0000000000000001\\nRBP: ffff88805a2dd6e0 R08: 0000000000000001 R09: 0000000000000000\\nR10: 0000000000000000 R11: 0001ffffffffffff R12: ffff88805a2dd680\\nR13: 0000000000000007 R14: ffff88800923f900 R15: ffff88805456004e\\nFS:  00007fc449127640(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 00007fc449126e38 CR3: 000000003de4b002 CR4: 0000000000770ef0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n ip_rcv_finish_core.constprop.0+0xbdd/0xd20 net/ipv4/ip_input.c:349\\n ip_rcv_finish+0xda/0x150 net/ipv4/ip_input.c:447\\n NF_HOOK include/linux/netfilter.h:314 [inline]\\n NF_HOOK include/linux/netfilter.h:308 [inline]\\n ip_rcv+0x16c/0x180 net/ipv4/ip_input.c:569\\n __netif_receive_skb_one_core+0xb3/0xe0 net/core/dev.c:5624\\n __netif_receive_skb+0x21/0xd0 net/core/dev.c:5738\\n netif_receive_skb_internal net/core/dev.c:5824 [inline]\\n netif_receive_skb+0x271/0x300 net/core/dev.c:5884\\n tun_rx_batched drivers/net/tun.c:1549 [inline]\\n tun_get_user+0x24db/0x2c50 drivers/net/tun.c:2002\\n tun_chr_write_iter+0x107/0x1a0 drivers/net/tun.c:2048\\n new_sync_write fs/read_write.c:497 [inline]\\n vfs_write+0x76f/0x8d0 fs/read_write.c:590\\n ksys_write+0xbf/0x190 fs/read_write.c:643\\n __do_sys_write fs/read_write.c:655 [inline]\\n __se_sys_write fs/read_write.c:652 [inline]\\n __x64_sys_write+0x41/0x50 fs/read_write.c:652\\n x64_sys_call+0xe66/0x1990 arch/x86/include/generated/asm/syscalls_64.h:2\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\\nRIP: 0033:0x7fc44a68bc1f\\nCode: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 e9 cf f5 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 3c d0 f5 ff 48\\nRSP: 002b:00007fc449126c90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\nRAX: ffffffffffffffda RBX: 00000000004bc050 RCX: 00007fc44a68bc1f\\nR\\n---truncated---\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-07-29T14:31:54.647Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-41041\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-11T17:32:58.050Z\", \"dateReserved\": \"2024-07-12T12:17:45.623Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T14:31:54.647Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.