CVE-2026-43384 CRITICAL

CVE-2026-43384: net/tcp-ao: Fix MAC comparison to be constant-time

Vendor Linux
Product Linux
Published May 8, 2026
Last update May 11, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 11, 2026 Record updated