{"id":"CVE-2022-49694","state":"PUBLISHED","title":"block: disable the elevator int del_gendisk","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: disable the elevator int del_gendisk\n\nThe elevator is only used for file system requests, which are stopped in\ndel_gendisk.  Move disabling the elevator and freeing the scheduler tags\nto the end of del_gendisk instead of doing that work in disk_release and\nblk_cleanup_queue to avoid a use after free on q->tag_set from\ndisk_release as the tag_set might not be alive at that point.\n\nMove the blk_qos_exit call as well, as it just depends on the elevator\nexit and would be the only reason to keep the not exactly cheap queue\nfreeze in disk_release.","publishedAt":"2025-02-26T02:24:16.910Z","updatedAt":"2026-05-11T19:04:54.796Z","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":"e155b0c238b20f0a866f4334d292656665836c8a","status":"affected","lessThan":"f28699fafc047ec33299da01e928c3a0073c5cc6","versionType":"git"},{"version":"e155b0c238b20f0a866f4334d292656665836c8a","status":"affected","lessThan":"50e34d78815e474d410f342fbe783b18192ca518","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-core.c","block/genhd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"5.18.8","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-core.c","block/genhd.c"]}],"references":["https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6","https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49694.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49694","state":"PUBLISHED","datePublished":"2025-02-26T02:24:16.910Z","dateUpdated":"2026-05-11T19:04:54.796Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:21:30.442Z"},"containers":{"cna":{"title":"block: disable the elevator int del_gendisk","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock: disable the elevator int del_gendisk\n\nThe elevator is only used for file system requests, which are stopped in\ndel_gendisk.  Move disabling the elevator and freeing the scheduler tags\nto the end of del_gendisk instead of doing that work in disk_release and\nblk_cleanup_queue to avoid a use after free on q->tag_set from\ndisk_release as the tag_set might not be alive at that point.\n\nMove the blk_qos_exit call as well, as it just depends on the elevator\nexit and would be the only reason to keep the not exactly cheap queue\nfreeze in disk_release."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e155b0c238b20f0a866f4334d292656665836c8a","status":"affected","lessThan":"f28699fafc047ec33299da01e928c3a0073c5cc6","versionType":"git"},{"version":"e155b0c238b20f0a866f4334d292656665836c8a","status":"affected","lessThan":"50e34d78815e474d410f342fbe783b18192ca518","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-core.c","block/genhd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"5.18.8","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["block/blk-core.c","block/genhd.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6"},{"url":"https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:04:54.796Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.19"}]}]}],"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-2022-49694","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-03-05T21:16:23.386514Z"}}}],"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":"2025-03-05T21:21:44.119Z"}}]}}}