In the Linux kernel, the following vulnerability has been resolved: xfs: fix another iunlink infinite loop bug in online fsck xrep_iunlink_resolve_bucket is supposed to reconstruct as much of the incore prev and next unlinked list pointers based on what it finds on disk and in memory before we move on to relinking the truly lost inodes back into the unlinked list. However, it's still vulnerable to infinite loops that come in via the next_unlinked pointers. Fix this problem by remembering which inodes we've already seen and checking new agino pointers against that. If a bit is already set, either this is a loop or the inode has nonzero link count. We'll deal with the second case in a subsequent patch.

A flaw was found in the XFS filesystem's online file system check (fsck) utility within the Linux kernel. The xrep_iunlink_resolve_bucket function, responsible for reconstructing unlinked inode lists, is vulnerable to an infinite loop. This can occur due to malformed next_unlinked pointers, potentially leading to a Denial of Service (DoS) where the system becomes unresponsive during an online filesystem check.

Red Hat Enterprise Linux 10 Not affected kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Not affected kernel Red Hat Enterprise Linux 9 Not affected kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-80532 https://nvd.nist.gov/vuln/detail/CVE-2026-80532 https://lore.kernel.org/linux-cve-announce/2026082603-CVE-2026-80532-6860@gregkh/T