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CVE-2025-40204

HIGHCVSS 8.1/10EPSS 0.19%

Last modified

CVE-2025-40204 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
0.19%

9.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b93fa8dc521d00d2d44bf034fb90e0d79b036617; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0e8b8c326c2a6de4d837b1bb034ea704f4690d77; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1cd60e0d0fb8f0e62ec4499138afce6342dc9d4c; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9c05d44ec24126fc283835b68f82dba3ae985209; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ed3044b9c810c5c24eb2830053fbfe5fd134c5d4; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8019b3699289fce3f10b63f98601db97b8d105b0; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 0b32ff285ff6f6f1ac1d9495787ccce8837d6405; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < dd91c79e4f58fbe2898dac84858033700e0e99fb
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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.
How severe is CVE-2025-40204?
CVE-2025-40204 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40204?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST