{"id":"CVE-2026-98244","title":"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 …","summary":"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 …","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 882af9f13e830c0a4ef696bb72cd5998a5067a93 < a32bedab8ece9d1f90a1476a5b486a1804dc78ba","Linux >= 882af9f13e830c0a4ef696bb72cd5998a5067a93 < b1df2997d0cd2be7bef7b4ab64ccfd1019dedc81","Linux >= 882af9f13e830c0a4ef696bb72cd5998a5067a93 < 3565893cc72cdf6b795cf6a33e7ff9605322334d","Linux 6.14"],"published":"2026-10-06","updated":"2026-10-06","sourceUpdated":"2026-10-06T09:18:12.510","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98244","references":[{"url":"https://git.kernel.org/stable/c/3565893cc72cdf6b795cf6a33e7ff9605322334d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a32bedab8ece9d1f90a1476a5b486a1804dc78ba","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b1df2997d0cd2be7bef7b4ab64ccfd1019dedc81","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98244.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98244"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546520"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98244"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98244"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98244.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-06T08:50:17.432Z","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-459"],"epss":0.00166,"epssPercentile":0.05795,"slug":"CVE-2026-98244","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-11 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98244.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219023,"id":"CVE-2026-98244","ts":1791707036345,"field":"cvss","old":null,"new":"5.5"},{"seq":219022,"id":"CVE-2026-98244","ts":1791707036345,"field":"severity","old":"none","new":"medium"}]}