{"id":"CVE-2026-97521","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: fix quota init duplicate scan\n\ngfs2_quota_init() checks for duplicate quota_change IDs while holding\nqd_lock and the quota hash bucket bitlock","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: fix quota init duplicate scan\n\ngfs2_quota_init() checks for duplicate quota_change IDs while holding\nqd_lock and the quota hash bucket bitlock. That path used\ngfs…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7fdcf16e5e14e11028f5bcaa6d25075eb5e876a0","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 812a766e2b0a8f4d094393fad13475c57f5f86db","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b99a1f0f18ee50445907f55069e88bcfd8947383","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T17:17:30.160","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97521","references":[{"url":"https://git.kernel.org/stable/c/7fdcf16e5e14e11028f5bcaa6d25075eb5e876a0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/812a766e2b0a8f4d094393fad13475c57f5f86db","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b99a1f0f18ee50445907f55069e88bcfd8947383","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-24T16:47:15.858Z","epss":0.00155,"epssPercentile":0.03877,"slug":"CVE-2026-97521","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: fix quota init duplicate scan\n\ngfs2_quota_init() checks for duplicate quota_change IDs while holding\nqd_lock and the quota hash bucket bitlock. That path used\ngfs2_qd_search_bucket(), which takes a lockref reference via\nlockref_get_not_dead().\n\nOn PREEMPT_RT this may sleep, which is not allowed under the bucket\nbitlock, triggering \"sleeping function called from invalid context\".\n\nUse a no-ref bucket lookup in this path, then continue duplicate\nhandling without taking a lockref there.\n\nRefactor gfs2_qd_search_bucket() to build on top of the no-ref helper\nso lookup traversal stays in one place.\n\nThis patch fixes a bug reported by syzbot.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}