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CVE-2023-53233 (GCVE-0-2023-53233)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:22 – Updated: 2026-05-11 19:40
VLAI
Title
net/smc: fix deadlock triggered by cancel_delayed_work_syn()
Summary
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix deadlock triggered by cancel_delayed_work_syn() The following LOCKDEP was detected: Workqueue: events smc_lgr_free_work [smc] WARNING: possible circular locking dependency detected 6.1.0-20221027.rc2.git8.56bc5b569087.300.fc36.s390x+debug #1 Not tainted ------------------------------------------------------ kworker/3:0/176251 is trying to acquire lock: 00000000f1467148 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0}, at: __flush_workqueue+0x7a/0x4f0 but task is already holding lock: 0000037fffe97dc8 ((work_completion)(&(&lgr->free_work)->work)){+.+.}-{0:0}, at: process_one_work+0x232/0x730 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 ((work_completion)(&(&lgr->free_work)->work)){+.+.}-{0:0}: __lock_acquire+0x58e/0xbd8 lock_acquire.part.0+0xe2/0x248 lock_acquire+0xac/0x1c8 __flush_work+0x76/0xf0 __cancel_work_timer+0x170/0x220 __smc_lgr_terminate.part.0+0x34/0x1c0 [smc] smc_connect_rdma+0x15e/0x418 [smc] __smc_connect+0x234/0x480 [smc] smc_connect+0x1d6/0x230 [smc] __sys_connect+0x90/0xc0 __do_sys_socketcall+0x186/0x370 __do_syscall+0x1da/0x208 system_call+0x82/0xb0 -> #3 (smc_client_lgr_pending){+.+.}-{3:3}: __lock_acquire+0x58e/0xbd8 lock_acquire.part.0+0xe2/0x248 lock_acquire+0xac/0x1c8 __mutex_lock+0x96/0x8e8 mutex_lock_nested+0x32/0x40 smc_connect_rdma+0xa4/0x418 [smc] __smc_connect+0x234/0x480 [smc] smc_connect+0x1d6/0x230 [smc] __sys_connect+0x90/0xc0 __do_sys_socketcall+0x186/0x370 __do_syscall+0x1da/0x208 system_call+0x82/0xb0 -> #2 (sk_lock-AF_SMC){+.+.}-{0:0}: __lock_acquire+0x58e/0xbd8 lock_acquire.part.0+0xe2/0x248 lock_acquire+0xac/0x1c8 lock_sock_nested+0x46/0xa8 smc_tx_work+0x34/0x50 [smc] process_one_work+0x30c/0x730 worker_thread+0x62/0x420 kthread+0x138/0x150 __ret_from_fork+0x3c/0x58 ret_from_fork+0xa/0x40 -> #1 ((work_completion)(&(&smc->conn.tx_work)->work)){+.+.}-{0:0}: __lock_acquire+0x58e/0xbd8 lock_acquire.part.0+0xe2/0x248 lock_acquire+0xac/0x1c8 process_one_work+0x2bc/0x730 worker_thread+0x62/0x420 kthread+0x138/0x150 __ret_from_fork+0x3c/0x58 ret_from_fork+0xa/0x40 -> #0 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0}: check_prev_add+0xd8/0xe88 validate_chain+0x70c/0xb20 __lock_acquire+0x58e/0xbd8 lock_acquire.part.0+0xe2/0x248 lock_acquire+0xac/0x1c8 __flush_workqueue+0xaa/0x4f0 drain_workqueue+0xaa/0x158 destroy_workqueue+0x44/0x2d8 smc_lgr_free+0x9e/0xf8 [smc] process_one_work+0x30c/0x730 worker_thread+0x62/0x420 kthread+0x138/0x150 __ret_from_fork+0x3c/0x58 ret_from_fork+0xa/0x40 other info that might help us debug this: Chain exists of: (wq_completion)smc_tx_wq-00000000#2 --> smc_client_lgr_pending --> (work_completion)(&(&lgr->free_work)->work) Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((work_completion)(&(&lgr->free_work)->work)); lock(smc_client_lgr_pending); lock((work_completion) (&(&lgr->free_work)->work)); lock((wq_completion)smc_tx_wq-00000000#2); *** DEADLOCK *** 2 locks held by kworker/3:0/176251: #0: 0000000080183548 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x232/0x730 #1: 0000037fffe97dc8 ((work_completion) (&(&lgr->free_work)->work)){+.+.}-{0:0}, at: process_one_work+0x232/0x730 stack backtr ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:55 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d , < 9708efad9ba5095b9bb7916e11a135b3bd66c071 (git)
Affected: a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d , < b615238e5bc01e13dc0610febddc1ca99bab1df6 (git)
Affected: a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d , < 3517584cf1b35bd02f4a90267ddf9dcf17bd9c87 (git)
Affected: a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d , < c9ca2257150272df1b8d9ebe5059197ffea6e913 (git)
Affected: a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d , < 13085e1b5cab8ad802904d72e6a6dae85ae0cd20 (git)
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Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.176 , ≤ 5.10.* (semver)
Unaffected: 5.15.104 , ≤ 5.15.* (semver)
Unaffected: 6.1.21 , ≤ 6.1.* (semver)
Unaffected: 6.2.8 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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              "attackComplexity": "LOW",
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.21",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.2.*",
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              "version": "6.2.8",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix deadlock triggered by cancel_delayed_work_syn()\n\nThe following LOCKDEP was detected:\n\t\tWorkqueue: events smc_lgr_free_work [smc]\n\t\tWARNING: possible circular locking dependency detected\n\t\t6.1.0-20221027.rc2.git8.56bc5b569087.300.fc36.s390x+debug #1 Not tainted\n\t\t------------------------------------------------------\n\t\tkworker/3:0/176251 is trying to acquire lock:\n\t\t00000000f1467148 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0},\n\t\t\tat: __flush_workqueue+0x7a/0x4f0\n\t\tbut task is already holding lock:\n\t\t0000037fffe97dc8 ((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0},\n\t\t\tat: process_one_work+0x232/0x730\n\t\twhich lock already depends on the new lock.\n\t\tthe existing dependency chain (in reverse order) is:\n\t\t-\u003e #4 ((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0}:\n\t\t       __lock_acquire+0x58e/0xbd8\n\t\t       lock_acquire.part.0+0xe2/0x248\n\t\t       lock_acquire+0xac/0x1c8\n\t\t       __flush_work+0x76/0xf0\n\t\t       __cancel_work_timer+0x170/0x220\n\t\t       __smc_lgr_terminate.part.0+0x34/0x1c0 [smc]\n\t\t       smc_connect_rdma+0x15e/0x418 [smc]\n\t\t       __smc_connect+0x234/0x480 [smc]\n\t\t       smc_connect+0x1d6/0x230 [smc]\n\t\t       __sys_connect+0x90/0xc0\n\t\t       __do_sys_socketcall+0x186/0x370\n\t\t       __do_syscall+0x1da/0x208\n\t\t       system_call+0x82/0xb0\n\t\t-\u003e #3 (smc_client_lgr_pending){+.+.}-{3:3}:\n\t\t       __lock_acquire+0x58e/0xbd8\n\t\t       lock_acquire.part.0+0xe2/0x248\n\t\t       lock_acquire+0xac/0x1c8\n\t\t       __mutex_lock+0x96/0x8e8\n\t\t       mutex_lock_nested+0x32/0x40\n\t\t       smc_connect_rdma+0xa4/0x418 [smc]\n\t\t       __smc_connect+0x234/0x480 [smc]\n\t\t       smc_connect+0x1d6/0x230 [smc]\n\t\t       __sys_connect+0x90/0xc0\n\t\t       __do_sys_socketcall+0x186/0x370\n\t\t       __do_syscall+0x1da/0x208\n\t\t       system_call+0x82/0xb0\n\t\t-\u003e #2 (sk_lock-AF_SMC){+.+.}-{0:0}:\n\t\t       __lock_acquire+0x58e/0xbd8\n\t\t       lock_acquire.part.0+0xe2/0x248\n\t\t       lock_acquire+0xac/0x1c8\n\t\t       lock_sock_nested+0x46/0xa8\n\t\t       smc_tx_work+0x34/0x50 [smc]\n\t\t       process_one_work+0x30c/0x730\n\t\t       worker_thread+0x62/0x420\n\t\t       kthread+0x138/0x150\n\t\t       __ret_from_fork+0x3c/0x58\n\t\t       ret_from_fork+0xa/0x40\n\t\t-\u003e #1 ((work_completion)(\u0026(\u0026smc-\u003econn.tx_work)-\u003ework)){+.+.}-{0:0}:\n\t\t       __lock_acquire+0x58e/0xbd8\n\t\t       lock_acquire.part.0+0xe2/0x248\n\t\t       lock_acquire+0xac/0x1c8\n\t\t       process_one_work+0x2bc/0x730\n\t\t       worker_thread+0x62/0x420\n\t\t       kthread+0x138/0x150\n\t\t       __ret_from_fork+0x3c/0x58\n\t\t       ret_from_fork+0xa/0x40\n\t\t-\u003e #0 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0}:\n\t\t       check_prev_add+0xd8/0xe88\n\t\t       validate_chain+0x70c/0xb20\n\t\t       __lock_acquire+0x58e/0xbd8\n\t\t       lock_acquire.part.0+0xe2/0x248\n\t\t       lock_acquire+0xac/0x1c8\n\t\t       __flush_workqueue+0xaa/0x4f0\n\t\t       drain_workqueue+0xaa/0x158\n\t\t       destroy_workqueue+0x44/0x2d8\n\t\t       smc_lgr_free+0x9e/0xf8 [smc]\n\t\t       process_one_work+0x30c/0x730\n\t\t       worker_thread+0x62/0x420\n\t\t       kthread+0x138/0x150\n\t\t       __ret_from_fork+0x3c/0x58\n\t\t       ret_from_fork+0xa/0x40\n\t\tother info that might help us debug this:\n\t\tChain exists of:\n\t\t  (wq_completion)smc_tx_wq-00000000#2\n\t  \t  --\u003e smc_client_lgr_pending\n\t\t  --\u003e (work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)\n\t\t Possible unsafe locking scenario:\n\t\t       CPU0                    CPU1\n\t\t       ----                    ----\n\t\t  lock((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework));\n\t\t                   lock(smc_client_lgr_pending);\n\t\t                   lock((work_completion)\n\t\t\t\t\t(\u0026(\u0026lgr-\u003efree_work)-\u003ework));\n\t\t  lock((wq_completion)smc_tx_wq-00000000#2);\n\t\t *** DEADLOCK ***\n\t\t2 locks held by kworker/3:0/176251:\n\t\t #0: 0000000080183548\n\t\t\t((wq_completion)events){+.+.}-{0:0},\n\t\t\t\tat: process_one_work+0x232/0x730\n\t\t #1: 0000037fffe97dc8\n\t\t\t((work_completion)\n\t\t\t (\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0},\n\t\t\t\tat: process_one_work+0x232/0x730\n\t\tstack backtr\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:40:49.189Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9708efad9ba5095b9bb7916e11a135b3bd66c071"
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        {
          "url": "https://git.kernel.org/stable/c/b615238e5bc01e13dc0610febddc1ca99bab1df6"
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        {
          "url": "https://git.kernel.org/stable/c/3517584cf1b35bd02f4a90267ddf9dcf17bd9c87"
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        {
          "url": "https://git.kernel.org/stable/c/13085e1b5cab8ad802904d72e6a6dae85ae0cd20"
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      "title": "net/smc: fix deadlock triggered by cancel_delayed_work_syn()",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53233",
    "datePublished": "2025-09-15T14:22:05.378Z",
    "dateReserved": "2025-09-15T14:19:21.847Z",
    "dateUpdated": "2026-05-11T19:40:49.189Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53233",
      "date": "2026-09-14",
      "epss": "0.00118",
      "percentile": "0.01924"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53233\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T15:15:50.297\",\"lastModified\":\"2026-06-17T06:44:34.857\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/smc: fix deadlock triggered by cancel_delayed_work_syn()\\n\\nThe following LOCKDEP was detected:\\n\\t\\tWorkqueue: events smc_lgr_free_work [smc]\\n\\t\\tWARNING: possible circular locking dependency detected\\n\\t\\t6.1.0-20221027.rc2.git8.56bc5b569087.300.fc36.s390x+debug #1 Not tainted\\n\\t\\t------------------------------------------------------\\n\\t\\tkworker/3:0/176251 is trying to acquire lock:\\n\\t\\t00000000f1467148 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0},\\n\\t\\t\\tat: __flush_workqueue+0x7a/0x4f0\\n\\t\\tbut task is already holding lock:\\n\\t\\t0000037fffe97dc8 ((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0},\\n\\t\\t\\tat: process_one_work+0x232/0x730\\n\\t\\twhich lock already depends on the new lock.\\n\\t\\tthe existing dependency chain (in reverse order) is:\\n\\t\\t-\u003e #4 ((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       __flush_work+0x76/0xf0\\n\\t\\t       __cancel_work_timer+0x170/0x220\\n\\t\\t       __smc_lgr_terminate.part.0+0x34/0x1c0 [smc]\\n\\t\\t       smc_connect_rdma+0x15e/0x418 [smc]\\n\\t\\t       __smc_connect+0x234/0x480 [smc]\\n\\t\\t       smc_connect+0x1d6/0x230 [smc]\\n\\t\\t       __sys_connect+0x90/0xc0\\n\\t\\t       __do_sys_socketcall+0x186/0x370\\n\\t\\t       __do_syscall+0x1da/0x208\\n\\t\\t       system_call+0x82/0xb0\\n\\t\\t-\u003e #3 (smc_client_lgr_pending){+.+.}-{3:3}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       __mutex_lock+0x96/0x8e8\\n\\t\\t       mutex_lock_nested+0x32/0x40\\n\\t\\t       smc_connect_rdma+0xa4/0x418 [smc]\\n\\t\\t       __smc_connect+0x234/0x480 [smc]\\n\\t\\t       smc_connect+0x1d6/0x230 [smc]\\n\\t\\t       __sys_connect+0x90/0xc0\\n\\t\\t       __do_sys_socketcall+0x186/0x370\\n\\t\\t       __do_syscall+0x1da/0x208\\n\\t\\t       system_call+0x82/0xb0\\n\\t\\t-\u003e #2 (sk_lock-AF_SMC){+.+.}-{0:0}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       lock_sock_nested+0x46/0xa8\\n\\t\\t       smc_tx_work+0x34/0x50 [smc]\\n\\t\\t       process_one_work+0x30c/0x730\\n\\t\\t       worker_thread+0x62/0x420\\n\\t\\t       kthread+0x138/0x150\\n\\t\\t       __ret_from_fork+0x3c/0x58\\n\\t\\t       ret_from_fork+0xa/0x40\\n\\t\\t-\u003e #1 ((work_completion)(\u0026(\u0026smc-\u003econn.tx_work)-\u003ework)){+.+.}-{0:0}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       process_one_work+0x2bc/0x730\\n\\t\\t       worker_thread+0x62/0x420\\n\\t\\t       kthread+0x138/0x150\\n\\t\\t       __ret_from_fork+0x3c/0x58\\n\\t\\t       ret_from_fork+0xa/0x40\\n\\t\\t-\u003e #0 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0}:\\n\\t\\t       check_prev_add+0xd8/0xe88\\n\\t\\t       validate_chain+0x70c/0xb20\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       __flush_workqueue+0xaa/0x4f0\\n\\t\\t       drain_workqueue+0xaa/0x158\\n\\t\\t       destroy_workqueue+0x44/0x2d8\\n\\t\\t       smc_lgr_free+0x9e/0xf8 [smc]\\n\\t\\t       process_one_work+0x30c/0x730\\n\\t\\t       worker_thread+0x62/0x420\\n\\t\\t       kthread+0x138/0x150\\n\\t\\t       __ret_from_fork+0x3c/0x58\\n\\t\\t       ret_from_fork+0xa/0x40\\n\\t\\tother info that might help us debug this:\\n\\t\\tChain exists of:\\n\\t\\t  (wq_completion)smc_tx_wq-00000000#2\\n\\t  \\t  --\u003e smc_client_lgr_pending\\n\\t\\t  --\u003e (work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)\\n\\t\\t Possible unsafe locking scenario:\\n\\t\\t       CPU0                    CPU1\\n\\t\\t       ----                    ----\\n\\t\\t  lock((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework));\\n\\t\\t                   lock(smc_client_lgr_pending);\\n\\t\\t                   lock((work_completion)\\n\\t\\t\\t\\t\\t(\u0026(\u0026lgr-\u003efree_work)-\u003ework));\\n\\t\\t  lock((wq_completion)smc_tx_wq-00000000#2);\\n\\t\\t *** DEADLOCK ***\\n\\t\\t2 locks held by kworker/3:0/176251:\\n\\t\\t #0: 0000000080183548\\n\\t\\t\\t((wq_completion)events){+.+.}-{0:0},\\n\\t\\t\\t\\tat: process_one_work+0x232/0x730\\n\\t\\t #1: 0000037fffe97dc8\\n\\t\\t\\t((work_completion)\\n\\t\\t\\t (\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0},\\n\\t\\t\\t\\tat: process_one_work+0x232/0x730\\n\\t\\tstack backtr\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/smc/smc_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\",\"lessThan\":\"9708efad9ba5095b9bb7916e11a135b3bd66c071\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\",\"lessThan\":\"b615238e5bc01e13dc0610febddc1ca99bab1df6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\",\"lessThan\":\"3517584cf1b35bd02f4a90267ddf9dcf17bd9c87\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\",\"lessThan\":\"c9ca2257150272df1b8d9ebe5059197ffea6e913\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\",\"lessThan\":\"13085e1b5cab8ad802904d72e6a6dae85ae0cd20\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/smc/smc_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.8\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.8\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.176\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.104\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.21\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2.8\",\"lessThanOrEqual\":\"6.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T17:55:41.706072Z\",\"id\":\"CVE-2023-53233\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.8\",\"versionEndExcluding\":\"5.10.176\",\"matchCriteriaId\":\"316AAE8F-666C-4A6E-989F-E3C02A37F7C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.104\",\"matchCriteriaId\":\"EB8A3D70-3EE1-4B1C-8A21-21CA7356DCA7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.21\",\"matchCriteriaId\":\"1F1CA6A9-8F4D-408D-9116-868EC067DCD9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.8\",\"matchCriteriaId\":\"4011EC6B-7786-4709-B765-186FA31D6F7F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A47F0FC3-CE52-4BA1-BA51-22F783938431\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/13085e1b5cab8ad802904d72e6a6dae85ae0cd20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3517584cf1b35bd02f4a90267ddf9dcf17bd9c87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9708efad9ba5095b9bb7916e11a135b3bd66c071\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b615238e5bc01e13dc0610febddc1ca99bab1df6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c9ca2257150272df1b8d9ebe5059197ffea6e913\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-21T19:11:49+00:00",
      "cve": "CVE-2023-53233",
      "id": "CVE-2023-53233",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "124",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service via deadlock in net/smc",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53233.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53233\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T17:55:41.706072Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-667\", \"description\": \"CWE-667 Improper Locking\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T17:55:37.300Z\"}}], \"cna\": {\"title\": \"net/smc: fix deadlock triggered by cancel_delayed_work_syn()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\", \"lessThan\": \"9708efad9ba5095b9bb7916e11a135b3bd66c071\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\", \"lessThan\": \"b615238e5bc01e13dc0610febddc1ca99bab1df6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\", \"lessThan\": \"3517584cf1b35bd02f4a90267ddf9dcf17bd9c87\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\", \"lessThan\": \"c9ca2257150272df1b8d9ebe5059197ffea6e913\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a52bcc919b14c9d78f03b2b4ff604e5ca69c7e6d\", \"lessThan\": \"13085e1b5cab8ad802904d72e6a6dae85ae0cd20\", \"versionType\": \"git\"}], \"programFiles\": [\"net/smc/smc_core.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.176\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.104\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.2.*\"}, {\"status\": \"unaffected\", \"version\": \"6.3\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/smc/smc_core.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9708efad9ba5095b9bb7916e11a135b3bd66c071\"}, {\"url\": \"https://git.kernel.org/stable/c/b615238e5bc01e13dc0610febddc1ca99bab1df6\"}, {\"url\": \"https://git.kernel.org/stable/c/3517584cf1b35bd02f4a90267ddf9dcf17bd9c87\"}, {\"url\": \"https://git.kernel.org/stable/c/c9ca2257150272df1b8d9ebe5059197ffea6e913\"}, {\"url\": \"https://git.kernel.org/stable/c/13085e1b5cab8ad802904d72e6a6dae85ae0cd20\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/smc: fix deadlock triggered by cancel_delayed_work_syn()\\n\\nThe following LOCKDEP was detected:\\n\\t\\tWorkqueue: events smc_lgr_free_work [smc]\\n\\t\\tWARNING: possible circular locking dependency detected\\n\\t\\t6.1.0-20221027.rc2.git8.56bc5b569087.300.fc36.s390x+debug #1 Not tainted\\n\\t\\t------------------------------------------------------\\n\\t\\tkworker/3:0/176251 is trying to acquire lock:\\n\\t\\t00000000f1467148 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0},\\n\\t\\t\\tat: __flush_workqueue+0x7a/0x4f0\\n\\t\\tbut task is already holding lock:\\n\\t\\t0000037fffe97dc8 ((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0},\\n\\t\\t\\tat: process_one_work+0x232/0x730\\n\\t\\twhich lock already depends on the new lock.\\n\\t\\tthe existing dependency chain (in reverse order) is:\\n\\t\\t-\u003e #4 ((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       __flush_work+0x76/0xf0\\n\\t\\t       __cancel_work_timer+0x170/0x220\\n\\t\\t       __smc_lgr_terminate.part.0+0x34/0x1c0 [smc]\\n\\t\\t       smc_connect_rdma+0x15e/0x418 [smc]\\n\\t\\t       __smc_connect+0x234/0x480 [smc]\\n\\t\\t       smc_connect+0x1d6/0x230 [smc]\\n\\t\\t       __sys_connect+0x90/0xc0\\n\\t\\t       __do_sys_socketcall+0x186/0x370\\n\\t\\t       __do_syscall+0x1da/0x208\\n\\t\\t       system_call+0x82/0xb0\\n\\t\\t-\u003e #3 (smc_client_lgr_pending){+.+.}-{3:3}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       __mutex_lock+0x96/0x8e8\\n\\t\\t       mutex_lock_nested+0x32/0x40\\n\\t\\t       smc_connect_rdma+0xa4/0x418 [smc]\\n\\t\\t       __smc_connect+0x234/0x480 [smc]\\n\\t\\t       smc_connect+0x1d6/0x230 [smc]\\n\\t\\t       __sys_connect+0x90/0xc0\\n\\t\\t       __do_sys_socketcall+0x186/0x370\\n\\t\\t       __do_syscall+0x1da/0x208\\n\\t\\t       system_call+0x82/0xb0\\n\\t\\t-\u003e #2 (sk_lock-AF_SMC){+.+.}-{0:0}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       lock_sock_nested+0x46/0xa8\\n\\t\\t       smc_tx_work+0x34/0x50 [smc]\\n\\t\\t       process_one_work+0x30c/0x730\\n\\t\\t       worker_thread+0x62/0x420\\n\\t\\t       kthread+0x138/0x150\\n\\t\\t       __ret_from_fork+0x3c/0x58\\n\\t\\t       ret_from_fork+0xa/0x40\\n\\t\\t-\u003e #1 ((work_completion)(\u0026(\u0026smc-\u003econn.tx_work)-\u003ework)){+.+.}-{0:0}:\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       process_one_work+0x2bc/0x730\\n\\t\\t       worker_thread+0x62/0x420\\n\\t\\t       kthread+0x138/0x150\\n\\t\\t       __ret_from_fork+0x3c/0x58\\n\\t\\t       ret_from_fork+0xa/0x40\\n\\t\\t-\u003e #0 ((wq_completion)smc_tx_wq-00000000#2){+.+.}-{0:0}:\\n\\t\\t       check_prev_add+0xd8/0xe88\\n\\t\\t       validate_chain+0x70c/0xb20\\n\\t\\t       __lock_acquire+0x58e/0xbd8\\n\\t\\t       lock_acquire.part.0+0xe2/0x248\\n\\t\\t       lock_acquire+0xac/0x1c8\\n\\t\\t       __flush_workqueue+0xaa/0x4f0\\n\\t\\t       drain_workqueue+0xaa/0x158\\n\\t\\t       destroy_workqueue+0x44/0x2d8\\n\\t\\t       smc_lgr_free+0x9e/0xf8 [smc]\\n\\t\\t       process_one_work+0x30c/0x730\\n\\t\\t       worker_thread+0x62/0x420\\n\\t\\t       kthread+0x138/0x150\\n\\t\\t       __ret_from_fork+0x3c/0x58\\n\\t\\t       ret_from_fork+0xa/0x40\\n\\t\\tother info that might help us debug this:\\n\\t\\tChain exists of:\\n\\t\\t  (wq_completion)smc_tx_wq-00000000#2\\n\\t  \\t  --\u003e smc_client_lgr_pending\\n\\t\\t  --\u003e (work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework)\\n\\t\\t Possible unsafe locking scenario:\\n\\t\\t       CPU0                    CPU1\\n\\t\\t       ----                    ----\\n\\t\\t  lock((work_completion)(\u0026(\u0026lgr-\u003efree_work)-\u003ework));\\n\\t\\t                   lock(smc_client_lgr_pending);\\n\\t\\t                   lock((work_completion)\\n\\t\\t\\t\\t\\t(\u0026(\u0026lgr-\u003efree_work)-\u003ework));\\n\\t\\t  lock((wq_completion)smc_tx_wq-00000000#2);\\n\\t\\t *** DEADLOCK ***\\n\\t\\t2 locks held by kworker/3:0/176251:\\n\\t\\t #0: 0000000080183548\\n\\t\\t\\t((wq_completion)events){+.+.}-{0:0},\\n\\t\\t\\t\\tat: process_one_work+0x232/0x730\\n\\t\\t #1: 0000037fffe97dc8\\n\\t\\t\\t((work_completion)\\n\\t\\t\\t (\u0026(\u0026lgr-\u003efree_work)-\u003ework)){+.+.}-{0:0},\\n\\t\\t\\t\\tat: process_one_work+0x232/0x730\\n\\t\\tstack backtr\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.176\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.104\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.21\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2.8\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.3\", \"versionStartIncluding\": \"5.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:40:49.189Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53233\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:40:49.189Z\", \"dateReserved\": \"2025-09-15T14:19:21.847Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-15T14:22:05.378Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.