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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"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.