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 (7)

Core 7

Scores

CVSS v3 9.4
EPSS 0.0007
EPSS Percentile 21.3%
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 (16)
Linux/Linux < 2.6.20
Linux/Linux 2.6.20
Linux/Linux 5.10.253 - 5.10.*
Linux/Linux 6.1.167 - 6.1.*
Linux/Linux 6.12.78 - 6.12.*
Linux/Linux 6.18.19 - 6.18.*
Linux/Linux 6.19.9 - 6.19.*
Linux/Linux 6.6.130 - 6.6.*
Linux/Linux 7.0
Linux/Linux cfb6eeb4c860592edd123fdea908d23c6ad1c7dc - 02669e2a4d207068edce7e8b5fafd85822018ce6
... and 6 more
Published May 08, 2026
Tracked Since May 08, 2026