CVE-2026-98443xfs: fix cursor and pointer handling when recovering iunlink buckets
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: xfs: fix cursor and pointer handling when recovering iunlink buckets LOLLM pointed out a bug in xlog_recover_iunlink_bucket: 1. We don't null out prev_ip after releasing it, which can lead to UAF problems if the inodegc flush call in the loop fails. at which point I noticed even more bugs: 2. If the inodegc flush inside the loop fails, we also leak @ip. 3. We set prev_agino to agino having already advanced agino, which results in inodes with i_prev_unlinked set to itself. 4. If we exit the bottom of the loop with prev_ip set, then prev_ip aliases ip and we also set its i_prev_unlinked to itself. Bugs 3 and 4 introduce loops into the unlinked list, though these loops don't surface because we immediately flush each unlinked inode after loading it. Fix all of these issues.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 04755d2e5821b3afbaadd09fe5df58d04de36484 builds before 8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1; 04755d2e5821b3afbaadd09fe5df58d04de36484 builds before 66a2179d02668f8df44b1a249899006f3ba38ea0; 04755d2e5821b3afbaadd09fe5df58d04de36484 builds before 961c717e6bf0e53c2c2b1fe4aef1add9390fedab; 04755d2e5821b3afbaadd09fe5df58d04de36484 builds before 65f39d09d73718611cee40399179323b5d4ead00 | CNA record |
References
- https://git.kernel.org/stable/c/8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1
- https://git.kernel.org/stable/c/66a2179d02668f8df44b1a249899006f3ba38ea0
- https://git.kernel.org/stable/c/961c717e6bf0e53c2c2b1fe4aef1add9390fedab
- https://git.kernel.org/stable/c/65f39d09d73718611cee40399179323b5d4ead00
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.