CVE-2023-54226 (GCVE-0-2023-54226)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2025-12-30 12:11
VLAI?
Title
af_unix: Fix data races around sk->sk_shutdown.
Summary
In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix data races around sk->sk_shutdown. KCSAN found a data race around sk->sk_shutdown where unix_release_sock() and unix_shutdown() update it under unix_state_lock(), OTOH unix_poll() and unix_dgram_poll() read it locklessly. We need to annotate the writes and reads with WRITE_ONCE() and READ_ONCE(). BUG: KCSAN: data-race in unix_poll / unix_release_sock write to 0xffff88800d0f8aec of 1 bytes by task 264 on cpu 0: unix_release_sock+0x75c/0x910 net/unix/af_unix.c:631 unix_release+0x59/0x80 net/unix/af_unix.c:1042 __sock_release+0x7d/0x170 net/socket.c:653 sock_close+0x19/0x30 net/socket.c:1397 __fput+0x179/0x5e0 fs/file_table.c:321 ____fput+0x15/0x20 fs/file_table.c:349 task_work_run+0x116/0x1a0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x174/0x180 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:297 do_syscall_64+0x4b/0x90 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x72/0xdc read to 0xffff88800d0f8aec of 1 bytes by task 222 on cpu 1: unix_poll+0xa3/0x2a0 net/unix/af_unix.c:3170 sock_poll+0xcf/0x2b0 net/socket.c:1385 vfs_poll include/linux/poll.h:88 [inline] ep_item_poll.isra.0+0x78/0xc0 fs/eventpoll.c:855 ep_send_events fs/eventpoll.c:1694 [inline] ep_poll fs/eventpoll.c:1823 [inline] do_epoll_wait+0x6c4/0xea0 fs/eventpoll.c:2258 __do_sys_epoll_wait fs/eventpoll.c:2270 [inline] __se_sys_epoll_wait fs/eventpoll.c:2265 [inline] __x64_sys_epoll_wait+0xcc/0x190 fs/eventpoll.c:2265 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 value changed: 0x00 -> 0x03 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 222 Comm: dbus-broker Not tainted 6.3.0-rc7-02330-gca6270c12e20 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1c488f4e95b498c977fbeae784983eb4cf6085e8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 196528ad484443627779540697f4fb0ef0e01c52 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8307e372e7445ec7d3cd2ff107ce5078eaa02815 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a41559ae3681975f1ced815d8d4c983b6b938499 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e410895892f99700ce54347d42c8dbe962eea9f4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f237f79b63c9242450e6869adcd2c10445859f28 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e1d09c2c2f5793474556b60f83900e088d0d366d (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 4.19.284 , ≤ 4.19.* (semver)
Unaffected: 5.4.244 , ≤ 5.4.* (semver)
Unaffected: 5.10.181 , ≤ 5.10.* (semver)
Unaffected: 5.15.113 , ≤ 5.15.* (semver)
Unaffected: 6.1.30 , ≤ 6.1.* (semver)
Unaffected: 6.3.4 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "net/unix/af_unix.c"
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              "versionType": "semver"
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              "status": "unaffected",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.3.4",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_unix: Fix data races around sk-\u003esk_shutdown.\n\nKCSAN found a data race around sk-\u003esk_shutdown where unix_release_sock()\nand unix_shutdown() update it under unix_state_lock(), OTOH unix_poll()\nand unix_dgram_poll() read it locklessly.\n\nWe need to annotate the writes and reads with WRITE_ONCE() and READ_ONCE().\n\nBUG: KCSAN: data-race in unix_poll / unix_release_sock\n\nwrite to 0xffff88800d0f8aec of 1 bytes by task 264 on cpu 0:\n unix_release_sock+0x75c/0x910 net/unix/af_unix.c:631\n unix_release+0x59/0x80 net/unix/af_unix.c:1042\n __sock_release+0x7d/0x170 net/socket.c:653\n sock_close+0x19/0x30 net/socket.c:1397\n __fput+0x179/0x5e0 fs/file_table.c:321\n ____fput+0x15/0x20 fs/file_table.c:349\n task_work_run+0x116/0x1a0 kernel/task_work.c:179\n resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]\n exit_to_user_mode_loop kernel/entry/common.c:171 [inline]\n exit_to_user_mode_prepare+0x174/0x180 kernel/entry/common.c:204\n __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]\n syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:297\n do_syscall_64+0x4b/0x90 arch/x86/entry/common.c:86\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nread to 0xffff88800d0f8aec of 1 bytes by task 222 on cpu 1:\n unix_poll+0xa3/0x2a0 net/unix/af_unix.c:3170\n sock_poll+0xcf/0x2b0 net/socket.c:1385\n vfs_poll include/linux/poll.h:88 [inline]\n ep_item_poll.isra.0+0x78/0xc0 fs/eventpoll.c:855\n ep_send_events fs/eventpoll.c:1694 [inline]\n ep_poll fs/eventpoll.c:1823 [inline]\n do_epoll_wait+0x6c4/0xea0 fs/eventpoll.c:2258\n __do_sys_epoll_wait fs/eventpoll.c:2270 [inline]\n __se_sys_epoll_wait fs/eventpoll.c:2265 [inline]\n __x64_sys_epoll_wait+0xcc/0x190 fs/eventpoll.c:2265\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\n\nvalue changed: 0x00 -\u003e 0x03\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 1 PID: 222 Comm: dbus-broker Not tainted 6.3.0-rc7-02330-gca6270c12e20 #2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:11:19.522Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1c488f4e95b498c977fbeae784983eb4cf6085e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/196528ad484443627779540697f4fb0ef0e01c52"
        },
        {
          "url": "https://git.kernel.org/stable/c/8307e372e7445ec7d3cd2ff107ce5078eaa02815"
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          "url": "https://git.kernel.org/stable/c/a41559ae3681975f1ced815d8d4c983b6b938499"
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          "url": "https://git.kernel.org/stable/c/f237f79b63c9242450e6869adcd2c10445859f28"
        },
        {
          "url": "https://git.kernel.org/stable/c/e1d09c2c2f5793474556b60f83900e088d0d366d"
        }
      ],
      "title": "af_unix: Fix data races around sk-\u003esk_shutdown.",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54226",
    "datePublished": "2025-12-30T12:11:19.522Z",
    "dateReserved": "2025-12-30T12:06:44.502Z",
    "dateUpdated": "2025-12-30T12:11:19.522Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54226\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:10.987\",\"lastModified\":\"2025-12-31T20:42:43.210\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: Fix data races around sk-\u003esk_shutdown.\\n\\nKCSAN found a data race around sk-\u003esk_shutdown where unix_release_sock()\\nand unix_shutdown() update it under unix_state_lock(), OTOH unix_poll()\\nand unix_dgram_poll() read it locklessly.\\n\\nWe need to annotate the writes and reads with WRITE_ONCE() and READ_ONCE().\\n\\nBUG: KCSAN: data-race in unix_poll / unix_release_sock\\n\\nwrite to 0xffff88800d0f8aec of 1 bytes by task 264 on cpu 0:\\n unix_release_sock+0x75c/0x910 net/unix/af_unix.c:631\\n unix_release+0x59/0x80 net/unix/af_unix.c:1042\\n __sock_release+0x7d/0x170 net/socket.c:653\\n sock_close+0x19/0x30 net/socket.c:1397\\n __fput+0x179/0x5e0 fs/file_table.c:321\\n ____fput+0x15/0x20 fs/file_table.c:349\\n task_work_run+0x116/0x1a0 kernel/task_work.c:179\\n resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]\\n exit_to_user_mode_loop kernel/entry/common.c:171 [inline]\\n exit_to_user_mode_prepare+0x174/0x180 kernel/entry/common.c:204\\n __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]\\n syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:297\\n do_syscall_64+0x4b/0x90 arch/x86/entry/common.c:86\\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\\n\\nread to 0xffff88800d0f8aec of 1 bytes by task 222 on cpu 1:\\n unix_poll+0xa3/0x2a0 net/unix/af_unix.c:3170\\n sock_poll+0xcf/0x2b0 net/socket.c:1385\\n vfs_poll include/linux/poll.h:88 [inline]\\n ep_item_poll.isra.0+0x78/0xc0 fs/eventpoll.c:855\\n ep_send_events fs/eventpoll.c:1694 [inline]\\n ep_poll fs/eventpoll.c:1823 [inline]\\n do_epoll_wait+0x6c4/0xea0 fs/eventpoll.c:2258\\n __do_sys_epoll_wait fs/eventpoll.c:2270 [inline]\\n __se_sys_epoll_wait fs/eventpoll.c:2265 [inline]\\n __x64_sys_epoll_wait+0xcc/0x190 fs/eventpoll.c:2265\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x3b/0x90 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\\n\\nvalue changed: 0x00 -\u003e 0x03\\n\\nReported by Kernel Concurrency Sanitizer on:\\nCPU: 1 PID: 222 Comm: dbus-broker Not tainted 6.3.0-rc7-02330-gca6270c12e20 #2\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/196528ad484443627779540697f4fb0ef0e01c52\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1c488f4e95b498c977fbeae784983eb4cf6085e8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8307e372e7445ec7d3cd2ff107ce5078eaa02815\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a41559ae3681975f1ced815d8d4c983b6b938499\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e1d09c2c2f5793474556b60f83900e088d0d366d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e410895892f99700ce54347d42c8dbe962eea9f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f237f79b63c9242450e6869adcd2c10445859f28\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.
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