CVE-2026-46094
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix bounds check in check_xattrs() to prevent out-of-bounds access The bounds check for the next xattr entry in check_xattrs() uses (void *)next >= end, which allows next to point within sizeof(u32) bytes of end. On the next loop iteration, IS_LAST_ENTRY() reads 4 bytes via *(__u32 *)(entry), which can overrun the valid xattr region. For example, if next lands at end - 1, the check passes since next < end, but IS_LAST_ENTRY() reads 4 bytes starting at end - 1, accessing 3 bytes beyond the valid region. Fix this by changing the check to (void *)next + sizeof(u32) > end, ensuring there is always enough space for the IS_LAST_ENTRY() read on the subsequent iteration.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 7.0.4-1 |
| debian | sid | fixed | 7.0.4-1 |
| debian | trixie | fixed | 6.12.86-1 |
| sles | affected | |
References
- https://git.kernel.org/stable/c/ab6da97bc310db35d4e4ef5354bc3ff626b0698c
- https://git.kernel.org/stable/c/5a5314d2387633a272a04d1bd8727f99058e4e68
- https://git.kernel.org/stable/c/537e065977022aa22f2c2503e8accaf16622e0fd
- https://git.kernel.org/stable/c/520986722dbf869c122252123fc161c7302eab7d
- https://git.kernel.org/stable/c/eceafc31ea7b42c984ece10d79d505c0bb6615d5
- https://security-tracker.debian.org/tracker/CVE-2026-46094
- https://www.suse.com/security/cve/CVE-2026-46094.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.