CVE-2026-43384
Description
In the Linux kernel, the following vulnerability has been resolved: net/tcp-ao: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-43384
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-43384.html
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1c
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfe
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.19.10-1 |
| debian | sid | fixed | 6.19.10-1 |
| debian | trixie | fixed | 6.12.85-1 |
| linux-kernel | affected | 6.12.78 | |
| linux-kernel | 7.0 | affected | |
References
- https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfe
- https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc
- https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125
- https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1c
- https://www.suse.com/security/cve/CVE-2026-43384.html
- https://security-tracker.debian.org/tracker/CVE-2026-43384
Verify integrity in audit chain (admin only). AS-IS.