CVE-2025-40204
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Publication date: 2025-11-12

Last updated on: 2025-11-14

Assigner: kernel.org

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.
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Meta Information
Published
2025-11-12
Last Modified
2025-11-14
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40204
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel involves the comparison of Message Authentication Codes (MACs) in a way that is not constant-time, which can allow timing attacks. The fix ensures that MAC comparisons are done using a constant-time helper function to prevent attackers from gaining information through timing differences.

Impact Analysis

If exploited, this vulnerability could allow an attacker to perform timing attacks to potentially reveal sensitive information from MAC comparisons, which could compromise the integrity and security of communications or data protected by these MACs.

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