CVE-2026-43383

In the Linux kernel, the following vulnerability has been resolved: net/tcp-md5: 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

9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-25)

CWE

CWE-208

Published

2026-05-08

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6
• https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3dd
• https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3
• https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cb
• https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbc

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