CVE-2024-41048 (GCVE-0-2024-41048)

Vulnerability from cvelistv5 – Published: 2024-07-29 14:32 – Updated: 2025-11-03 21:59
VLAI?
Title
skmsg: Skip zero length skb in sk_msg_recvmsg
Summary
In the Linux kernel, the following vulnerability has been resolved: skmsg: Skip zero length skb in sk_msg_recvmsg When running BPF selftests (./test_progs -t sockmap_basic) on a Loongarch platform, the following kernel panic occurs: [...] Oops[#1]: CPU: 22 PID: 2824 Comm: test_progs Tainted: G OE 6.10.0-rc2+ #18 Hardware name: LOONGSON Dabieshan/Loongson-TC542F0, BIOS Loongson-UDK2018 ... ... ra: 90000000048bf6c0 sk_msg_recvmsg+0x120/0x560 ERA: 9000000004162774 copy_page_to_iter+0x74/0x1c0 CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) PRMD: 0000000c (PPLV0 +PIE +PWE) EUEN: 00000007 (+FPE +SXE +ASXE -BTE) ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7) ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0) BADV: 0000000000000040 PRID: 0014c011 (Loongson-64bit, Loongson-3C5000) Modules linked in: bpf_testmod(OE) xt_CHECKSUM xt_MASQUERADE xt_conntrack Process test_progs (pid: 2824, threadinfo=0000000000863a31, task=...) Stack : ... Call Trace: [<9000000004162774>] copy_page_to_iter+0x74/0x1c0 [<90000000048bf6c0>] sk_msg_recvmsg+0x120/0x560 [<90000000049f2b90>] tcp_bpf_recvmsg_parser+0x170/0x4e0 [<90000000049aae34>] inet_recvmsg+0x54/0x100 [<900000000481ad5c>] sock_recvmsg+0x7c/0xe0 [<900000000481e1a8>] __sys_recvfrom+0x108/0x1c0 [<900000000481e27c>] sys_recvfrom+0x1c/0x40 [<9000000004c076ec>] do_syscall+0x8c/0xc0 [<9000000003731da4>] handle_syscall+0xc4/0x160 Code: ... ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Fatal exception Kernel relocated by 0x3510000 .text @ 0x9000000003710000 .data @ 0x9000000004d70000 .bss @ 0x9000000006469400 ---[ end Kernel panic - not syncing: Fatal exception ]--- [...] This crash happens every time when running sockmap_skb_verdict_shutdown subtest in sockmap_basic. This crash is because a NULL pointer is passed to page_address() in the sk_msg_recvmsg(). Due to the different implementations depending on the architecture, page_address(NULL) will trigger a panic on Loongarch platform but not on x86 platform. So this bug was hidden on x86 platform for a while, but now it is exposed on Loongarch platform. The root cause is that a zero length skb (skb->len == 0) was put on the queue. This zero length skb is a TCP FIN packet, which was sent by shutdown(), invoked in test_sockmap_skb_verdict_shutdown(): shutdown(p1, SHUT_WR); In this case, in sk_psock_skb_ingress_enqueue(), num_sge is zero, and no page is put to this sge (see sg_set_page in sg_set_page), but this empty sge is queued into ingress_msg list. And in sk_msg_recvmsg(), this empty sge is used, and a NULL page is got by sg_page(sge). Pass this NULL page to copy_page_to_iter(), which passes it to kmap_local_page() and to page_address(), then kernel panics. To solve this, we should skip this zero length skb. So in sk_msg_recvmsg(), if copy is zero, that means it's a zero length skb, skip invoking copy_page_to_iter(). We are using the EFAULT return triggered by copy_page_to_iter to check for is_fin in tcp_bpf.c.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < 195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632 (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < fb61d7b9fb6ef0032de469499a54dab4c7260d0d (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < b180739b45a38b4caa88fe16bb5273072e6613dc (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < f8bd689f37f4198a4c61c4684f591ba639595b97 (git)
Affected: 604326b41a6fb9b4a78b6179335decee0365cd8c , < f0c18025693707ec344a70b6887f7450bf4c826b (git)
Create a notification for this product.
    Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (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": "2025-11-03T21:59:48.428Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/fb61d7b9fb6ef0032de469499a54dab4c7260d0d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/b180739b45a38b4caa88fe16bb5273072e6613dc"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f8bd689f37f4198a4c61c4684f591ba639595b97"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f0c18025693707ec344a70b6887f7450bf4c826b"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-41048",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:22:50.876207Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:34:02.036Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/skmsg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632",
              "status": "affected",
              "version": "604326b41a6fb9b4a78b6179335decee0365cd8c",
              "versionType": "git"
            },
            {
              "lessThan": "fb61d7b9fb6ef0032de469499a54dab4c7260d0d",
              "status": "affected",
              "version": "604326b41a6fb9b4a78b6179335decee0365cd8c",
              "versionType": "git"
            },
            {
              "lessThan": "b180739b45a38b4caa88fe16bb5273072e6613dc",
              "status": "affected",
              "version": "604326b41a6fb9b4a78b6179335decee0365cd8c",
              "versionType": "git"
            },
            {
              "lessThan": "f8bd689f37f4198a4c61c4684f591ba639595b97",
              "status": "affected",
              "version": "604326b41a6fb9b4a78b6179335decee0365cd8c",
              "versionType": "git"
            },
            {
              "lessThan": "f0c18025693707ec344a70b6887f7450bf4c826b",
              "status": "affected",
              "version": "604326b41a6fb9b4a78b6179335decee0365cd8c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/skmsg.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": "5.15.*",
              "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": "5.15.163",
                  "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\nskmsg: Skip zero length skb in sk_msg_recvmsg\n\nWhen running BPF selftests (./test_progs -t sockmap_basic) on a Loongarch\nplatform, the following kernel panic occurs:\n\n  [...]\n  Oops[#1]:\n  CPU: 22 PID: 2824 Comm: test_progs Tainted: G           OE  6.10.0-rc2+ #18\n  Hardware name: LOONGSON Dabieshan/Loongson-TC542F0, BIOS Loongson-UDK2018\n     ... ...\n     ra: 90000000048bf6c0 sk_msg_recvmsg+0x120/0x560\n    ERA: 9000000004162774 copy_page_to_iter+0x74/0x1c0\n   CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)\n   PRMD: 0000000c (PPLV0 +PIE +PWE)\n   EUEN: 00000007 (+FPE +SXE +ASXE -BTE)\n   ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7)\n  ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0)\n   BADV: 0000000000000040\n   PRID: 0014c011 (Loongson-64bit, Loongson-3C5000)\n  Modules linked in: bpf_testmod(OE) xt_CHECKSUM xt_MASQUERADE xt_conntrack\n  Process test_progs (pid: 2824, threadinfo=0000000000863a31, task=...)\n  Stack : ...\n  Call Trace:\n  [\u003c9000000004162774\u003e] copy_page_to_iter+0x74/0x1c0\n  [\u003c90000000048bf6c0\u003e] sk_msg_recvmsg+0x120/0x560\n  [\u003c90000000049f2b90\u003e] tcp_bpf_recvmsg_parser+0x170/0x4e0\n  [\u003c90000000049aae34\u003e] inet_recvmsg+0x54/0x100\n  [\u003c900000000481ad5c\u003e] sock_recvmsg+0x7c/0xe0\n  [\u003c900000000481e1a8\u003e] __sys_recvfrom+0x108/0x1c0\n  [\u003c900000000481e27c\u003e] sys_recvfrom+0x1c/0x40\n  [\u003c9000000004c076ec\u003e] do_syscall+0x8c/0xc0\n  [\u003c9000000003731da4\u003e] handle_syscall+0xc4/0x160\n  Code: ...\n  ---[ end trace 0000000000000000 ]---\n  Kernel panic - not syncing: Fatal exception\n  Kernel relocated by 0x3510000\n   .text @ 0x9000000003710000\n   .data @ 0x9000000004d70000\n   .bss  @ 0x9000000006469400\n  ---[ end Kernel panic - not syncing: Fatal exception ]---\n  [...]\n\nThis crash happens every time when running sockmap_skb_verdict_shutdown\nsubtest in sockmap_basic.\n\nThis crash is because a NULL pointer is passed to page_address() in the\nsk_msg_recvmsg(). Due to the different implementations depending on the\narchitecture, page_address(NULL) will trigger a panic on Loongarch\nplatform but not on x86 platform. So this bug was hidden on x86 platform\nfor a while, but now it is exposed on Loongarch platform. The root cause\nis that a zero length skb (skb-\u003elen == 0) was put on the queue.\n\nThis zero length skb is a TCP FIN packet, which was sent by shutdown(),\ninvoked in test_sockmap_skb_verdict_shutdown():\n\n\tshutdown(p1, SHUT_WR);\n\nIn this case, in sk_psock_skb_ingress_enqueue(), num_sge is zero, and no\npage is put to this sge (see sg_set_page in sg_set_page), but this empty\nsge is queued into ingress_msg list.\n\nAnd in sk_msg_recvmsg(), this empty sge is used, and a NULL page is got by\nsg_page(sge). Pass this NULL page to copy_page_to_iter(), which passes it\nto kmap_local_page() and to page_address(), then kernel panics.\n\nTo solve this, we should skip this zero length skb. So in sk_msg_recvmsg(),\nif copy is zero, that means it\u0027s a zero length skb, skip invoking\ncopy_page_to_iter(). We are using the EFAULT return triggered by\ncopy_page_to_iter to check for is_fin in tcp_bpf.c."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T09:20:54.907Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb61d7b9fb6ef0032de469499a54dab4c7260d0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/b180739b45a38b4caa88fe16bb5273072e6613dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8bd689f37f4198a4c61c4684f591ba639595b97"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0c18025693707ec344a70b6887f7450bf4c826b"
        }
      ],
      "title": "skmsg: Skip zero length skb in sk_msg_recvmsg",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-41048",
    "datePublished": "2024-07-29T14:32:05.224Z",
    "dateReserved": "2024-07-12T12:17:45.625Z",
    "dateUpdated": "2025-11-03T21:59:48.428Z",
    "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/195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/fb61d7b9fb6ef0032de469499a54dab4c7260d0d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b180739b45a38b4caa88fe16bb5273072e6613dc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f8bd689f37f4198a4c61c4684f591ba639595b97\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f0c18025693707ec344a70b6887f7450bf4c826b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T21:59:48.428Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-41048\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:22:50.876207Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:20.281Z\"}}], \"cna\": {\"title\": \"skmsg: Skip zero length skb in sk_msg_recvmsg\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"fb61d7b9fb6ef0032de469499a54dab4c7260d0d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"b180739b45a38b4caa88fe16bb5273072e6613dc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"f8bd689f37f4198a4c61c4684f591ba639595b97\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"604326b41a6fb9b4a78b6179335decee0365cd8c\", \"lessThan\": \"f0c18025693707ec344a70b6887f7450bf4c826b\", \"versionType\": \"git\"}], \"programFiles\": [\"net/core/skmsg.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\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.163\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.100\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.41\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/core/skmsg.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/195b7bcdfc5adc5b2468f279dd9eb7eebd2e7632\"}, {\"url\": \"https://git.kernel.org/stable/c/fb61d7b9fb6ef0032de469499a54dab4c7260d0d\"}, {\"url\": \"https://git.kernel.org/stable/c/b180739b45a38b4caa88fe16bb5273072e6613dc\"}, {\"url\": \"https://git.kernel.org/stable/c/f8bd689f37f4198a4c61c4684f591ba639595b97\"}, {\"url\": \"https://git.kernel.org/stable/c/f0c18025693707ec344a70b6887f7450bf4c826b\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nskmsg: Skip zero length skb in sk_msg_recvmsg\\n\\nWhen running BPF selftests (./test_progs -t sockmap_basic) on a Loongarch\\nplatform, the following kernel panic occurs:\\n\\n  [...]\\n  Oops[#1]:\\n  CPU: 22 PID: 2824 Comm: test_progs Tainted: G           OE  6.10.0-rc2+ #18\\n  Hardware name: LOONGSON Dabieshan/Loongson-TC542F0, BIOS Loongson-UDK2018\\n     ... ...\\n     ra: 90000000048bf6c0 sk_msg_recvmsg+0x120/0x560\\n    ERA: 9000000004162774 copy_page_to_iter+0x74/0x1c0\\n   CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)\\n   PRMD: 0000000c (PPLV0 +PIE +PWE)\\n   EUEN: 00000007 (+FPE +SXE +ASXE -BTE)\\n   ECFG: 00071c1d (LIE=0,2-4,10-12 VS=7)\\n  ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0)\\n   BADV: 0000000000000040\\n   PRID: 0014c011 (Loongson-64bit, Loongson-3C5000)\\n  Modules linked in: bpf_testmod(OE) xt_CHECKSUM xt_MASQUERADE xt_conntrack\\n  Process test_progs (pid: 2824, threadinfo=0000000000863a31, task=...)\\n  Stack : ...\\n  Call Trace:\\n  [\u003c9000000004162774\u003e] copy_page_to_iter+0x74/0x1c0\\n  [\u003c90000000048bf6c0\u003e] sk_msg_recvmsg+0x120/0x560\\n  [\u003c90000000049f2b90\u003e] tcp_bpf_recvmsg_parser+0x170/0x4e0\\n  [\u003c90000000049aae34\u003e] inet_recvmsg+0x54/0x100\\n  [\u003c900000000481ad5c\u003e] sock_recvmsg+0x7c/0xe0\\n  [\u003c900000000481e1a8\u003e] __sys_recvfrom+0x108/0x1c0\\n  [\u003c900000000481e27c\u003e] sys_recvfrom+0x1c/0x40\\n  [\u003c9000000004c076ec\u003e] do_syscall+0x8c/0xc0\\n  [\u003c9000000003731da4\u003e] handle_syscall+0xc4/0x160\\n  Code: ...\\n  ---[ end trace 0000000000000000 ]---\\n  Kernel panic - not syncing: Fatal exception\\n  Kernel relocated by 0x3510000\\n   .text @ 0x9000000003710000\\n   .data @ 0x9000000004d70000\\n   .bss  @ 0x9000000006469400\\n  ---[ end Kernel panic - not syncing: Fatal exception ]---\\n  [...]\\n\\nThis crash happens every time when running sockmap_skb_verdict_shutdown\\nsubtest in sockmap_basic.\\n\\nThis crash is because a NULL pointer is passed to page_address() in the\\nsk_msg_recvmsg(). Due to the different implementations depending on the\\narchitecture, page_address(NULL) will trigger a panic on Loongarch\\nplatform but not on x86 platform. So this bug was hidden on x86 platform\\nfor a while, but now it is exposed on Loongarch platform. The root cause\\nis that a zero length skb (skb-\u003elen == 0) was put on the queue.\\n\\nThis zero length skb is a TCP FIN packet, which was sent by shutdown(),\\ninvoked in test_sockmap_skb_verdict_shutdown():\\n\\n\\tshutdown(p1, SHUT_WR);\\n\\nIn this case, in sk_psock_skb_ingress_enqueue(), num_sge is zero, and no\\npage is put to this sge (see sg_set_page in sg_set_page), but this empty\\nsge is queued into ingress_msg list.\\n\\nAnd in sk_msg_recvmsg(), this empty sge is used, and a NULL page is got by\\nsg_page(sge). Pass this NULL page to copy_page_to_iter(), which passes it\\nto kmap_local_page() and to page_address(), then kernel panics.\\n\\nTo solve this, we should skip this zero length skb. So in sk_msg_recvmsg(),\\nif copy is zero, that means it\u0027s a zero length skb, skip invoking\\ncopy_page_to_iter(). We are using the EFAULT return triggered by\\ncopy_page_to_iter to check for is_fin in tcp_bpf.c.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.163\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.100\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.41\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.10\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"4.20\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:20:54.907Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-41048\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:59:48.428Z\", \"dateReserved\": \"2024-07-12T12:17:45.625Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T14:32:05.224Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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.