CVE-2026-43384
9.8
CRITICAL
CVSS 3.1
EPSS 0.06%
Description
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.
How to fix CVE-2026-43384
To remediate CVE-2026-43384, upgrade the affected package to a fixed version below.
- Debian/linux—upgrade to 6.12.85-1 or later
Is CVE-2026-43384 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 6.12.85-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |