CVE-2026-43383

CRITICAL

net/tcp-md5: Fix MAC comparison to be constant-time

Title source: cna
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: net/tcp-md5: 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 (8)

Core 8

Scores

CVSS v3 9.4
EPSS 0.0044
EPSS Percentile 35.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Details

Status published
Products (27)
linux/Kernel 2.6.20 - 5.10.253linux
linux/Kernel 5.11.0 - 5.15.210linux
linux/Kernel 5.16.0 - 6.1.167linux
linux/Kernel 6.13.0 - 6.18.19linux
linux/Kernel 6.19.0 - 6.19.9linux
linux/Kernel 6.2.0 - 6.6.130linux
linux/Kernel 6.7.0 - 6.12.78linux
Linux/Linux < 2.6.20
Linux/Linux 2.6.20
Linux/Linux 5.10.253 - 5.10.*
... and 17 more
Published May 08, 2026
Tracked Since May 08, 2026