{"id":"CVE-2026-98443","published":"2026-10-18T16:16:54.620","lastModified":"2026-10-19T10:18:53.400","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix cursor and pointer handling when recovering iunlink buckets\n\nLOLLM pointed out a bug in xlog_recover_iunlink_bucket:\n\n1. We don't null out prev_ip after releasing it, which can lead to UAF\n   problems if the inodegc flush call in the loop fails.\n\nat which point I noticed even more bugs:\n\n2. If the inodegc flush inside the loop fails, we also leak @ip.\n\n3. We set prev_agino to agino having already advanced agino, which\n   results in inodes with i_prev_unlinked set to itself.\n\n4. If we exit the bottom of the loop with prev_ip set, then prev_ip\n   aliases ip and we also set its i_prev_unlinked to itself.\n\nBugs 3 and 4 introduce loops into the unlinked list, though these loops\ndon't surface because we immediately flush each unlinked inode after\nloading it.\n\nFix all of these issues.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/65f39d09d73718611cee40399179323b5d4ead00","tags":[]},{"url":"https://git.kernel.org/stable/c/66a2179d02668f8df44b1a249899006f3ba38ea0","tags":[]},{"url":"https://git.kernel.org/stable/c/8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1","tags":[]},{"url":"https://git.kernel.org/stable/c/961c717e6bf0e53c2c2b1fe4aef1add9390fedab","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}