CVE-2026-43452
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.
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 |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 6.1.170-1 |
| debian | forky | fixed | 6.19.10-1 |
| debian | sid | fixed | 6.19.10-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 5.10.253 | |
| linux-kernel | 7.0 | affected | |
| debian | bullseye | fixed | 5.10.257-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gcp | | |
References
- https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c
- https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540
- https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823
- https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5
- https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a
- https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907
- https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4
- https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36
- https://www.suse.com/security/cve/CVE-2026-43452.html
- https://security-tracker.debian.org/tracker/CVE-2026-43452
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.