{"id":"CVE-2026-80820","state":"PUBLISHED","title":"xfs: don't livelock in scrub on a circular unlinked list","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't livelock in scrub on a circular unlinked list\n\nLOLLM points out that online fsck can livelock if an unlinked inode list\ncontains a loop.  Use a bitmap to detect cycles.","publishedAt":"2026-09-04T15:13:41.355Z","updatedAt":"2026-09-04T15:13:41.355Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"599453f83458b57995290a1d31200c263e2c2691","versionType":"git"},{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"159d162fe80bd56573cafde5801bd5a90a3dd1ac","versionType":"git"},{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"56407a61a8bb85b884de802d39635abdb0ea7408","versionType":"git"},{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"527eaaefddb6ec5c83a06c9a1559960dd6361753","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/agheader.c","fs/xfs/scrub/agheader_repair.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/agheader.c","fs/xfs/scrub/agheader_repair.c"]}],"references":["https://git.kernel.org/stable/c/599453f83458b57995290a1d31200c263e2c2691","https://git.kernel.org/stable/c/159d162fe80bd56573cafde5801bd5a90a3dd1ac","https://git.kernel.org/stable/c/56407a61a8bb85b884de802d39635abdb0ea7408","https://git.kernel.org/stable/c/527eaaefddb6ec5c83a06c9a1559960dd6361753"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80820.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80820","state":"PUBLISHED","datePublished":"2026-09-04T15:13:41.355Z","dateUpdated":"2026-09-04T15:13:41.355Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.795Z"},"containers":{"cna":{"title":"xfs: don't livelock in scrub on a circular unlinked list","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't livelock in scrub on a circular unlinked list\n\nLOLLM points out that online fsck can livelock if an unlinked inode list\ncontains a loop.  Use a bitmap to detect cycles."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"599453f83458b57995290a1d31200c263e2c2691","versionType":"git"},{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"159d162fe80bd56573cafde5801bd5a90a3dd1ac","versionType":"git"},{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"56407a61a8bb85b884de802d39635abdb0ea7408","versionType":"git"},{"version":"a12890aebb895951720ff884eab1c99a30645b29","status":"affected","lessThan":"527eaaefddb6ec5c83a06c9a1559960dd6361753","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/agheader.c","fs/xfs/scrub/agheader_repair.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/agheader.c","fs/xfs/scrub/agheader_repair.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/599453f83458b57995290a1d31200c263e2c2691"},{"url":"https://git.kernel.org/stable/c/159d162fe80bd56573cafde5801bd5a90a3dd1ac"},{"url":"https://git.kernel.org/stable/c/56407a61a8bb85b884de802d39635abdb0ea7408"},{"url":"https://git.kernel.org/stable/c/527eaaefddb6ec5c83a06c9a1559960dd6361753"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-09-04T15:13:41.355Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.12.106"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.18.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.1.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}