{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49995","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-06-18T10:57:27.387Z","datePublished":"2025-06-18T11:00:55.352Z","dateUpdated":"2026-05-11T19:10:41.429Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:10:41.429Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwriteback: avoid use-after-free after removing device\n\nWhen a disk is removed, bdi_unregister gets called to stop further\nwriteback and wait for associated delayed work to complete.  However,\nwb_inode_writeback_end() may schedule bandwidth estimation dwork after\nthis has completed, which can result in the timer attempting to access the\njust freed bdi_writeback.\n\nFix this by checking if the bdi_writeback is alive, similar to when\nscheduling writeback work.\n\nSince this requires wb->work_lock, and wb_inode_writeback_end() may get\ncalled from interrupt, switch wb->work_lock to an irqsafe lock."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fs-writeback.c","mm/backing-dev.c","mm/page-writeback.c"],"versions":[{"version":"45a2966fd64147518dc5bca25f447bd0fb5359ac","lessThan":"f96b9f7c1676923bce871e728bb49c0dfa5013cc","status":"affected","versionType":"git"},{"version":"45a2966fd64147518dc5bca25f447bd0fb5359ac","lessThan":"9a6c710f3bc10bc9cc23e1c080b53245b7f9d5b7","status":"affected","versionType":"git"},{"version":"45a2966fd64147518dc5bca25f447bd0fb5359ac","lessThan":"f87904c075515f3e1d8f4a7115869d3b914674fd","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fs-writeback.c","mm/backing-dev.c","mm/page-writeback.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"5.15.64","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.19.6","lessThanOrEqual":"5.19.*","status":"unaffected","versionType":"semver"},{"version":"6.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f96b9f7c1676923bce871e728bb49c0dfa5013cc"},{"url":"https://git.kernel.org/stable/c/9a6c710f3bc10bc9cc23e1c080b53245b7f9d5b7"},{"url":"https://git.kernel.org/stable/c/f87904c075515f3e1d8f4a7115869d3b914674fd"}],"title":"writeback: avoid use-after-free after removing device","x_generator":{"engine":"bippy-1.2.0"}}}}