CVE-2026-43384

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

Critical · published May 8, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
51.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00671 · 51.4th percentile
Published
2026-05-08T14:21Z
EPSS history
Timeline
  • 08 MAY 14:21Z
    net/tcp-ao: Fix MAC comparison to be constant-time
    cvelistv5