CVE-2026-23223
High
Description
In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in xchk_btree_check_block_owner 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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedFeb 18, 2026
First seenFeb 18, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel6.12.72, 6.18.11, 6.19.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.9 ≤ v < 6.12.72, 6.13 ≤ v < 6.18.11, 6.19 ≤ v < 6.19.1 | 6.12.72, 6.18.11, 6.19.1 |
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