net: Fix load-tearing on sk->sk_stamp in sock_recv_cmsgs().

{
  "id": "7f1d4b068e6df5f77aa13aacf14ec1ed8b31d6fa8dfd0ff1d05cf2f6e5d68749",
  "url": "https://osv.dev/vulnerability/CVE-2023-54218",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: Fix load-tearing on sk->sk_stamp in sock_recv_cmsgs().",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: Fix load-tearing on sk->sk_stamp in sock_recv_cmsgs(). KCSAN found a data race in sock_recv_cmsgs() where the read access to sk->sk_stamp needs READ_ONCE(). BUG: KCSAN: data-race in packet_recvmsg / packet_recvmsg write (marked) to 0xffff88803c81f258 of 8 bytes by task 19171 on cpu 0: sock_write_timestamp include/net/sock.h:2670 [inline] sock_recv_cmsgs include/net/sock.h:2722 [inline] packet_recvmsg+0xb97/0xd00 net/packet/af_packet.c:3489 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg+0x11a/0x130 net/socket.c:1040 sock_read_iter+0x176/0x220 net/socket.c:1118 call_read_iter include/linux/fs.h:1845 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x5e0/0x630 fs/read_write.c:470 ksys_read+0x163/0x1a0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __x64_sys_read+0x41/0x50 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x72/0xdc read to 0xffff88803c81f258 of 8 bytes by task 19183 on cpu 1: sock_recv_cmsgs include/net/sock.h:2721 [inline] packet_recvmsg+0xb64/0xd00 net/packet/af_packet.c:3489 sock_recvmsg_nosec net/socket.c:1019 [inline] sock_recvmsg+0x11a/0x130 net/socket.c:1040 sock_read_iter+0x176/0x220 net/socket.c:1118 call_read_iter include/linux/fs.h:1845 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0",
    "evidence": "osv:CVE-2023-54218",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.14.316",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "4.19.284",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.244",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.181",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.113",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.30",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.3.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-54218",
      "aliases": [
        "CVE-2023-54218"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6c7c98bad4883a4a8710c96b2b44de482865eb6e"
                },
                {
                  "fixed": "fd28692fa182d25e8d26bc1db506648839fde245"
                },
                {
                  "fixed": "564c3150ad357d571a0de7d8b644aa1f7e6e21b7"
                },
                {
                  "fixed": "d7343f8de019ebb55b2b6ef79b971f6ceb361a99"
                },
                {
                  "fixed": "d06f67b2b8dcd00d995c468428b6bccebc5762d8"
                },
                {
                  "fixed": "de260d1e02cde39d317066835ee6e5234fc9f5a8"
                },
                {
                  "fixed": "7145f2309d649ad6273b9f66448321b9b4c523c8"
                },
                {
                  "fixed": "8319220054e5ea5f506d8d4c4b5e234f668ffc3b"
                },
                {
                  "fixed": "dfd9248c071a3710c24365897459538551cb7167"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54218.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.12.0"
                },
                {
                  "fixed": "4.14.316"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.15.0"
                },
                {
                  "fixed": "4.19.284"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.20.0"
                },
                {
                  "fixed": "5.4.244"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.181"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.113"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.30"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.3.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54218.json"
          }
        }
      ],
      "modified": "2026-10-30T02:30:58.803564027Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/564c3150ad357d571a0de7d8b644aa1f7e6e21b7",
        "https://git.kernel.org/stable/c/7145f2309d649ad6273b9f66448321b9b4c523c8",
        "https://git.kernel.org/stable/c/8319220054e5ea5f506d8d4c4b5e234f668ffc3b",
        "https://git.kernel.org/stable/c/d06f67b2b8dcd00d995c468428b6bccebc5762d8",
        "https://git.kernel.org/stable/c/d7343f8de019ebb55b2b6ef79b971f6ceb361a99",
        "https://git.kernel.org/stable/c/de260d1e02cde39d317066835ee6e5234fc9f5a8",
        "https://git.kernel.org/stable/c/dfd9248c071a3710c24365897459538551cb7167",
        "https://git.kernel.org/stable/c/fd28692fa182d25e8d26bc1db506648839fde245",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54218.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-54218",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54218.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-54218",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518011,
  "published_at": "2025-12-30T12:11:14.059+00:00"
}