Service interruption via discarded quota verification error
Published Aug 26, 2026 · Updated Aug 26, 2026
XFS quota recovery flaw in Linux allows local users to interrupt service when a corrupt quota record is replayed during filesystem recovery. In fs/xfs/xfs_dquot_item_recover.c, xlog_recover_dquot_commit_pass2() sets -EFSCORRUPTED after xfs_dqblk_verify() rejects a recovered dquot, but its release path returns zero and permits the corrupt quota buffer to reach disk. Reachability requires XFS log recovery of an invalid quota record; the published record does not identify how a local user creates that state.
Summary
What happened
XFS quota recovery flaw in Linux allows local users to interrupt service when a corrupt quota record is replayed during filesystem recovery. In fs/xfs/xfs_dquot_item_recover.c, xlog_recover_dquot_commit_pass2() sets -EFSCORRUPTED after xfs_dqblk_verify() rejects a recovered dquot, but its release path returns zero and permits the corrupt quota buffer to reach disk. Reachability requires XFS log recovery of an invalid quota record; the published record does not identify how a local user creates that state.
The record
- CVE
- CVE-2026-80529
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-252
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 26, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=3581868f51a2edb027a898988b5b5a4ba379ee55 <5b756fbb60b5d26063f46a11a3c7daa7eb616d79
- Affected versionversion=6.1.128 <6.1.184
- Affected versionversion=6.6.17 <6.6.153
- Affected versionversion=6.7
- Affected versionversion=7880b1f0adef4d363f42d6bb42aab3211291351b <e506e127fcb4e2bad1045805f1740b395eea9618
- Affected versionversion=9c235dfc3d3f901fe22acb20f2ab37ff39f2ce02 <36a31b12540c0a0a3b77a01fda86de646f2961fb
- Affected versionversion=9c235dfc3d3f901fe22acb20f2ab37ff39f2ce02 <38a4dbe588bd028a07a77dc5cee62ee3ce21e87d
- Affected versionversion=9c235dfc3d3f901fe22acb20f2ab37ff39f2ce02 <a233b3362a3c7bf23f5143b4ef4b17ec337fcb4d
- Affected versionversion=9c235dfc3d3f901fe22acb20f2ab37ff39f2ce02 <e2b4a856085e9bd939bde2dee0d08b1d41babde9
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What is affected?
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Attacks
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Your stack
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