CVE-2023-53686 (GCVE-0-2023-53686)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:21 – Updated: 2025-10-07 15:21
VLAI?
Title
net/handshake: fix null-ptr-deref in handshake_nl_done_doit()
Summary
In the Linux kernel, the following vulnerability has been resolved: net/handshake: fix null-ptr-deref in handshake_nl_done_doit() We should not call trace_handshake_cmd_done_err() if socket lookup has failed. Also we should call trace_handshake_cmd_done_err() before releasing the file, otherwise dereferencing sock->sk can return garbage. This also reverts 7afc6d0a107f ("net/handshake: Fix uninitialized local variable") Unable to handle kernel paging request at virtual address dfff800000000003 KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000003] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 5986 Comm: syz-executor292 Not tainted 6.5.0-rc7-syzkaller-gfe4469582053 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : handshake_nl_done_doit+0x198/0x9c8 net/handshake/netlink.c:193 lr : handshake_nl_done_doit+0x180/0x9c8 sp : ffff800096e37180 x29: ffff800096e37200 x28: 1ffff00012dc6e34 x27: dfff800000000000 x26: ffff800096e373d0 x25: 0000000000000000 x24: 00000000ffffffa8 x23: ffff800096e373f0 x22: 1ffff00012dc6e38 x21: 0000000000000000 x20: ffff800096e371c0 x19: 0000000000000018 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800080516cc4 x15: 0000000000000001 x14: 1fffe0001b14aa3b x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000003 x8 : 0000000000000003 x7 : ffff800080afe47c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080a88078 x2 : 0000000000000001 x1 : 00000000ffffffa8 x0 : 0000000000000000 Call trace: handshake_nl_done_doit+0x198/0x9c8 net/handshake/netlink.c:193 genl_family_rcv_msg_doit net/netlink/genetlink.c:970 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1050 [inline] genl_rcv_msg+0x96c/0xc50 net/netlink/genetlink.c:1067 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2549 genl_rcv+0x38/0x50 net/netlink/genetlink.c:1078 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] ____sys_sendmsg+0x56c/0x840 net/socket.c:2494 ___sys_sendmsg net/socket.c:2548 [inline] __sys_sendmsg+0x26c/0x33c net/socket.c:2577 __do_sys_sendmsg net/socket.c:2586 [inline] __se_sys_sendmsg net/socket.c:2584 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2584 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: 12800108 b90043e8 910062b3 d343fe68 (387b6908)
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3b3009ea8abb713b022d94fba95ec270cf6e7eae , < 93d69f18edcca282351394c5870bec24cc99d745 (git)
Affected: 3b3009ea8abb713b022d94fba95ec270cf6e7eae , < 82ba0ff7bf0483d962e592017bef659ae022d754 (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.5.4 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/handshake/netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "93d69f18edcca282351394c5870bec24cc99d745",
              "status": "affected",
              "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
              "versionType": "git"
            },
            {
              "lessThan": "82ba0ff7bf0483d962e592017bef659ae022d754",
              "status": "affected",
              "version": "3b3009ea8abb713b022d94fba95ec270cf6e7eae",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/handshake/netlink.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.4",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/handshake: fix null-ptr-deref in handshake_nl_done_doit()\n\nWe should not call trace_handshake_cmd_done_err() if socket lookup has failed.\n\nAlso we should call trace_handshake_cmd_done_err() before releasing the file,\notherwise dereferencing sock-\u003esk can return garbage.\n\nThis also reverts 7afc6d0a107f (\"net/handshake: Fix uninitialized local variable\")\n\nUnable to handle kernel paging request at virtual address dfff800000000003\nKASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]\nMem abort info:\nESR = 0x0000000096000005\nEC = 0x25: DABT (current EL), IL = 32 bits\nSET = 0, FnV = 0\nEA = 0, S1PTW = 0\nFSC = 0x05: level 1 translation fault\nData abort info:\nISV = 0, ISS = 0x00000005, ISS2 = 0x00000000\nCM = 0, WnR = 0, TnD = 0, TagAccess = 0\nGCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[dfff800000000003] address between user and kernel address ranges\nInternal error: Oops: 0000000096000005 [#1] PREEMPT SMP\nModules linked in:\nCPU: 1 PID: 5986 Comm: syz-executor292 Not tainted 6.5.0-rc7-syzkaller-gfe4469582053 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023\npstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : handshake_nl_done_doit+0x198/0x9c8 net/handshake/netlink.c:193\nlr : handshake_nl_done_doit+0x180/0x9c8\nsp : ffff800096e37180\nx29: ffff800096e37200 x28: 1ffff00012dc6e34 x27: dfff800000000000\nx26: ffff800096e373d0 x25: 0000000000000000 x24: 00000000ffffffa8\nx23: ffff800096e373f0 x22: 1ffff00012dc6e38 x21: 0000000000000000\nx20: ffff800096e371c0 x19: 0000000000000018 x18: 0000000000000000\nx17: 0000000000000000 x16: ffff800080516cc4 x15: 0000000000000001\nx14: 1fffe0001b14aa3b x13: 0000000000000000 x12: 0000000000000000\nx11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000003\nx8 : 0000000000000003 x7 : ffff800080afe47c x6 : 0000000000000000\nx5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080a88078\nx2 : 0000000000000001 x1 : 00000000ffffffa8 x0 : 0000000000000000\nCall trace:\nhandshake_nl_done_doit+0x198/0x9c8 net/handshake/netlink.c:193\ngenl_family_rcv_msg_doit net/netlink/genetlink.c:970 [inline]\ngenl_family_rcv_msg net/netlink/genetlink.c:1050 [inline]\ngenl_rcv_msg+0x96c/0xc50 net/netlink/genetlink.c:1067\nnetlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2549\ngenl_rcv+0x38/0x50 net/netlink/genetlink.c:1078\nnetlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]\nnetlink_unicast+0x660/0x8d4 net/netlink/af_netlink.c:1365\nnetlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1914\nsock_sendmsg_nosec net/socket.c:725 [inline]\nsock_sendmsg net/socket.c:748 [inline]\n____sys_sendmsg+0x56c/0x840 net/socket.c:2494\n___sys_sendmsg net/socket.c:2548 [inline]\n__sys_sendmsg+0x26c/0x33c net/socket.c:2577\n__do_sys_sendmsg net/socket.c:2586 [inline]\n__se_sys_sendmsg net/socket.c:2584 [inline]\n__arm64_sys_sendmsg+0x80/0x94 net/socket.c:2584\n__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]\ninvoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51\nel0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136\ndo_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155\nel0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678\nel0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696\nel0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591\nCode: 12800108 b90043e8 910062b3 d343fe68 (387b6908)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-07T15:21:38.824Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/93d69f18edcca282351394c5870bec24cc99d745"
        },
        {
          "url": "https://git.kernel.org/stable/c/82ba0ff7bf0483d962e592017bef659ae022d754"
        }
      ],
      "title": "net/handshake: fix null-ptr-deref in handshake_nl_done_doit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53686",
    "datePublished": "2025-10-07T15:21:38.824Z",
    "dateReserved": "2025-10-07T15:16:59.665Z",
    "dateUpdated": "2025-10-07T15:21:38.824Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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