CVE-2026-43384

CRITICAL

net/tcp-ao: Fix MAC comparison to be constant-time

Title source: cna

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.

References (4)

Core 4

Core References

https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125

https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1c

https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfe

https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc

Scores

CVSS v3 9.8

EPSS 0.0006

EPSS Percentile 18.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published

Products (10)

Linux/Linux < 6.7

Linux/Linux 0a3a809089eb1d4a0a2fd0c16b520d603988c859 - 080b0e210088296dd50d6637c06c1db14246adfe

Linux/Linux 0a3a809089eb1d4a0a2fd0c16b520d603988c859 - 67edfec516d30d3e62925c397be4a1e5185802fc

Linux/Linux 0a3a809089eb1d4a0a2fd0c16b520d603988c859 - 8be6ed64966da48b6c4726918f106c18742a5125

Linux/Linux 0a3a809089eb1d4a0a2fd0c16b520d603988c859 - a269cbdc442f8658bca35383e34b9d0b0ff95a1c

Linux/Linux 6.12.78 - 6.12.*

Linux/Linux 6.18.19 - 6.18.*

Linux/Linux 6.19.9 - 6.19.*

Linux/Linux 6.7

Linux/Linux 7.0

Published May 08, 2026

Tracked Since May 08, 2026