by Kastro
Paper/Archive/CVE-2026-43384

CVE-2026-43384

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

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 39.7.397 × 207.9No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux0a3a809089eb1d4a0a2fd0c16b520d603988c859 – < 8be6ed64966da48b6c4726918f106c18742a51258be6ed64966da48b6c4726918f106c18742a5125CNA
Linux0a3a809089eb1d4a0a2fd0c16b520d603988c859 – < a269cbdc442f8658bca35383e34b9d0b0ff95a1ca269cbdc442f8658bca35383e34b9d0b0ff95a1cCNA
Linux0a3a809089eb1d4a0a2fd0c16b520d603988c859 – < 080b0e210088296dd50d6637c06c1db14246adfe080b0e210088296dd50d6637c06c1db14246adfeCNA
Linux0a3a809089eb1d4a0a2fd0c16b520d603988c859 – < 67edfec516d30d3e62925c397be4a1e5185802fc67edfec516d30d3e62925c397be4a1e5185802fcCNA
Linux6.76.12.78CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgit.kernel.org/stable/c/8be6ed64966da48b6c4726918f106c18742a5125refgit.kernel.org/stable/c/a269cbdc442f8658bca35383e34b9d0b0ff95a1crefgit.kernel.org/stable/c/080b0e210088296dd50d6637c06c1db14246adferefgit.kernel.org/stable/c/67edfec516d30d3e62925c397be4a1e5185802fc