CVE-2025-40204

In the Linux kernel, the following vulnerability has been resolved: sctp: 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

8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

Published

2025-11-12

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• https://git.kernel.org/stable/c/0b32ff285ff6f6f1ac1d9495787ccce8837d6405
• https://git.kernel.org/stable/c/0e8b8c326c2a6de4d837b1bb034ea704f4690d77
• https://git.kernel.org/stable/c/1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c
• https://git.kernel.org/stable/c/8019b3699289fce3f10b63f98601db97b8d105b0
• https://git.kernel.org/stable/c/9c05d44ec24126fc283835b68f82dba3ae985209

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