VulnerabilityAnalyzed
CVE-2026-43384
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.
CRITICAL 9.8EPSS 0.46%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adfePatch
- https://git.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fcPatch
- https://git.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125Patch
- https://git.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1cPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.