Unrated severityNVD Advisory· Published Feb 18, 2026· Updated Apr 13, 2026

xfs: fix UAF in xchk_btree_check_block_owner

CVE-2026-23223

Description

In the Linux kernel, the following vulnerability has been resolved:

We cannot dereference bs->cur when trying to determine if bs->cur aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed. Fix this by sampling before type before any freeing could happen. The correct temporal ordering was broken when we removed xfs_btnum_t.

Affected products

Linux/Kernelllm-fuzzy
Linux/Linuxv5
Range: 6.9

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

git.kernel.org/stable/c/1c253e11225bc5167217897885b85093e17c2217mitre
git.kernel.org/stable/c/1d411278dda293a507cb794db7d9ed3511c685c6mitre
git.kernel.org/stable/c/ba5264610423d9653aa36920520902d83841bcfdmitre
git.kernel.org/stable/c/ed82e7949f5cac3058f4100f3cd670531d41a266mitre

News mentions

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