{"id":"CVE-2026-98244","state":"PUBLISHED","title":"btrfs: clear free space tree creation state on rebuild failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: clear free space tree creation state on rebuild failure\n\nbtrfs_rebuild_free_space_tree() sets BTRFS_FS_CREATING_FREE_SPACE_TREE\nbefore rebuilding the free space tree.  Several error paths return\nwithout clearing this flag.\n\nThe transaction restart failure path can leave the flag set on a live\nfilesystem, causing delayed reference processing to be skipped. Clear it\non all free space tree rebuild failure paths. Keep\nBTRFS_FS_FREE_SPACE_TREE_UNTRUSTED set, since a failed rebuild leaves\nthe free space tree untrusted. Callers must fall back to extent-tree\ncaching.","publishedAt":"2026-10-06T08:45:14.120Z","updatedAt":"2026-10-19T09:16:15.841Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"882af9f13e830c0a4ef696bb72cd5998a5067a93","status":"affected","lessThan":"a32bedab8ece9d1f90a1476a5b486a1804dc78ba","versionType":"git"},{"version":"882af9f13e830c0a4ef696bb72cd5998a5067a93","status":"affected","lessThan":"b1df2997d0cd2be7bef7b4ab64ccfd1019dedc81","versionType":"git"},{"version":"882af9f13e830c0a4ef696bb72cd5998a5067a93","status":"affected","lessThan":"3565893cc72cdf6b795cf6a33e7ff9605322334d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/free-space-tree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/free-space-tree.c"]}],"references":["https://git.kernel.org/stable/c/a32bedab8ece9d1f90a1476a5b486a1804dc78ba","https://git.kernel.org/stable/c/b1df2997d0cd2be7bef7b4ab64ccfd1019dedc81","https://git.kernel.org/stable/c/3565893cc72cdf6b795cf6a33e7ff9605322334d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98244.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98244","state":"PUBLISHED","datePublished":"2026-10-06T08:45:14.120Z","dateUpdated":"2026-10-19T09:16:15.841Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.330Z"},"containers":{"cna":{"title":"btrfs: clear free space tree creation state on rebuild failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: clear free space tree creation state on rebuild failure\n\nbtrfs_rebuild_free_space_tree() sets BTRFS_FS_CREATING_FREE_SPACE_TREE\nbefore rebuilding the free space tree.  Several error paths return\nwithout clearing this flag.\n\nThe transaction restart failure path can leave the flag set on a live\nfilesystem, causing delayed reference processing to be skipped. Clear it\non all free space tree rebuild failure paths. Keep\nBTRFS_FS_FREE_SPACE_TREE_UNTRUSTED set, since a failed rebuild leaves\nthe free space tree untrusted. Callers must fall back to extent-tree\ncaching."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"882af9f13e830c0a4ef696bb72cd5998a5067a93","status":"affected","lessThan":"a32bedab8ece9d1f90a1476a5b486a1804dc78ba","versionType":"git"},{"version":"882af9f13e830c0a4ef696bb72cd5998a5067a93","status":"affected","lessThan":"b1df2997d0cd2be7bef7b4ab64ccfd1019dedc81","versionType":"git"},{"version":"882af9f13e830c0a4ef696bb72cd5998a5067a93","status":"affected","lessThan":"3565893cc72cdf6b795cf6a33e7ff9605322334d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/free-space-tree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.14","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/free-space-tree.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a32bedab8ece9d1f90a1476a5b486a1804dc78ba"},{"url":"https://git.kernel.org/stable/c/b1df2997d0cd2be7bef7b4ab64ccfd1019dedc81"},{"url":"https://git.kernel.org/stable/c/3565893cc72cdf6b795cf6a33e7ff9605322334d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:16:15.841Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}