{"id":"CVE-2022-50422","state":"PUBLISHED","title":"scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()","description":"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->timer\". 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->slow_task) //FREE|\n                               |  task->slow_task->... //USE\n\nFix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure\nthe timer handler have finished before the \"task->slow_task\" is\ndeallocated.","publishedAt":"2025-10-01T11:41:55.147Z","updatedAt":"2026-05-11T19:19:11.176Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"a9e5176ead6de64f572ad5c87a72825d9d3c82ae","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"e45a1516d2933703a4823d9db71e17c3abeba24f","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"f7a785177611ffc97d645fcbc196e6de6ad2421d","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"2e12ce270f0d926085c1209cc90397e307deef97","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"46ba53c30666717cb06c2b3c5d896301cd00d0c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libsas/sas_expander.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.19","versionType":"semver"},{"version":"5.4.220","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.150","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.75","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.17","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0.3","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libsas/sas_expander.c"]}],"references":["https://git.kernel.org/stable/c/117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe","https://git.kernel.org/stable/c/a9e5176ead6de64f572ad5c87a72825d9d3c82ae","https://git.kernel.org/stable/c/e45a1516d2933703a4823d9db71e17c3abeba24f","https://git.kernel.org/stable/c/f7a785177611ffc97d645fcbc196e6de6ad2421d","https://git.kernel.org/stable/c/2e12ce270f0d926085c1209cc90397e307deef97","https://git.kernel.org/stable/c/46ba53c30666717cb06c2b3c5d896301cd00d0c0"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50422.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50422","state":"PUBLISHED","datePublished":"2025-10-01T11:41:55.147Z","dateUpdated":"2026-05-11T19:19:11.176Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-09-17T14:53:07.004Z"},"containers":{"cna":{"title":"scsi: libsas: Fix use-after-free bug in smp_execute_task_sg()","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->timer\". 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->slow_task) //FREE|\n                               |  task->slow_task->... //USE\n\nFix by calling del_timer_sync() in smp_execute_task_sg(), which makes sure\nthe timer handler have finished before the \"task->slow_task\" is\ndeallocated."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"117331a2a5227fb4369c2a1f321d3e3e2e2ef8fe","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"a9e5176ead6de64f572ad5c87a72825d9d3c82ae","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"e45a1516d2933703a4823d9db71e17c3abeba24f","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"f7a785177611ffc97d645fcbc196e6de6ad2421d","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"2e12ce270f0d926085c1209cc90397e307deef97","versionType":"git"},{"version":"2908d778ab3e244900c310974e1fc1c69066e450","status":"affected","lessThan":"46ba53c30666717cb06c2b3c5d896301cd00d0c0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libsas/sas_expander.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.19","versionType":"semver"},{"version":"5.4.220","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.150","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.75","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.17","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0.3","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/libsas/sas_expander.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:19:11.176Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.4.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.10.150"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.15.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"5.19.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.0.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.19","versionEndExcluding":"6.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"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":[{"cweId":"CWE-416","lang":"en","type":"CWE","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-14T17:42:46.496Z"}}]}}}