CVE-2026-43383

CriticalCVSS 9.4/10Last modified Nov 11, 2026

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.

Metrics

CVSS 3.1 9.4/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Weakness enumeration

CWE-208

Affected software

VendorProductVersions
LinuxLinux>= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < 821c8751fdeecdeecabeb11704dd33439c9e4bbc; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < ff44ec94d4fc8348600a69de0a8fa1102c23bce8; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < 345a9530756528d7ca407663d659c3c40e75c3dd; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < 5d305a95130a8d08b9545e47f1e18d29d59866cb; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < 02669e2a4d207068edce7e8b5fafd85822018ce6; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < ae3831b44f477de048287493e184fc3ff913b624; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < b502e97e29d791ff7a8051f29a414535739be218; >= cfb6eeb4c860592edd123fdea908d23c6ad1c7dc, < 46d0d6f50dab706637f4c18a470aac20a21900d3
LinuxLinux2.6.20

References

Timeline

Published
May 8, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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CVE-2026-43383: Critical severity, CVSS 9.4 | Vulnix