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CVE-2022-50422 (GCVE-0-2022-50422)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:41 – Updated: 2026-05-11 19:19
VLAI
Title
scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: libsas: Fix use-after-free bug in smp_execute_task_sg() When executing SMP task failed, the smp_execute_task_sg() calls del_timer() to delete "slow_task->timer". However, if the timer handler sas_task_internal_timedout() is running, the del_timer() in smp_execute_task_sg() will not stop it and a UAF will happen. The process is shown below: (thread 1) | (thread 2) smp_execute_task_sg() | sas_task_internal_timedout() ... | del_timer() | ... | ... sas_free_task(task) | kfree(task->slow_task) //FREE| | task->slow_task->... //USE Fix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure the timer handler have finished before the "task->slow_task" is deallocated.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:39 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < 117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < a9e5176ead6de64f572ad5c87a72825d9d3c82ae (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < e45a1516d2933703a4823d9db71e17c3abeba24f (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < f7a785177611ffc97d645fcbc196e6de6ad2421d (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < 2e12ce270f0d926085c1209cc90397e307deef97 (git)
Affected: 2908d778ab3e244900c310974e1fc1c69066e450 , < 46ba53c30666717cb06c2b3c5d896301cd00d0c0 (git)
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Linux Linux Affected: 2.6.19
Unaffected: 0 , < 2.6.19 (semver)
Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-50422\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T17:39:50.991299Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T17:39:46.658Z\"}}], \"cna\": {\"title\": \"scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2908d778ab3e244900c310974e1fc1c69066e450\", \"lessThan\": \"117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2908d778ab3e244900c310974e1fc1c69066e450\", \"lessThan\": \"a9e5176ead6de64f572ad5c87a72825d9d3c82ae\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2908d778ab3e244900c310974e1fc1c69066e450\", \"lessThan\": \"e45a1516d2933703a4823d9db71e17c3abeba24f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2908d778ab3e244900c310974e1fc1c69066e450\", \"lessThan\": \"f7a785177611ffc97d645fcbc196e6de6ad2421d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2908d778ab3e244900c310974e1fc1c69066e450\", \"lessThan\": \"2e12ce270f0d926085c1209cc90397e307deef97\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2908d778ab3e244900c310974e1fc1c69066e450\", \"lessThan\": \"46ba53c30666717cb06c2b3c5d896301cd00d0c0\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/scsi/libsas/sas_expander.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.19\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.19\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.220\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.150\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.75\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.19.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/scsi/libsas/sas_expander.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe\"}, {\"url\": \"https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae\"}, {\"url\": \"https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f\"}, {\"url\": \"https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d\"}, {\"url\": \"https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97\"}, {\"url\": \"https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: libsas: Fix use-after-free bug in smp_execute_task_sg()\\n\\nWhen executing SMP task failed, the smp_execute_task_sg() calls del_timer()\\nto delete \\\"slow_task-\u003etimer\\\". However, if the timer handler\\nsas_task_internal_timedout() is running, the del_timer() in\\nsmp_execute_task_sg() will not stop it and a UAF will happen. The process\\nis shown below:\\n\\n      (thread 1)               |        (thread 2)\\nsmp_execute_task_sg()          | sas_task_internal_timedout()\\n ...                           |\\n del_timer()                   |\\n ...                           |  ...\\n sas_free_task(task)           |\\n  kfree(task-\u003eslow_task) //FREE|\\n                               |  task-\u003eslow_task-\u003e... //USE\\n\\nFix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure\\nthe timer handler have finished before the \\\"task-\u003eslow_task\\\" is\\ndeallocated.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.220\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.150\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.75\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19.17\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.3\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"2.6.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:19:11.176Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-50422\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:19:11.176Z\", \"dateReserved\": \"2025-09-17T14:53:07.004Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-10-01T11:41:55.147Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}