Information Exposure Affecting kernel6.12-libbpf-static package, versions <1:6.12.55-74.119.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.06% (20th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL612LIBBPFSTATIC-14432688
  • published17 Dec 2025
  • disclosed12 Nov 2025

Introduced: 12 Nov 2025

CVE-2025-40204  (opens in a new tab)
CWE-208  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel6.12-libbpf-static to version 1:6.12.55-74.119.amzn2023 or higher.
This issue was patched in ALAS2023-2025-1316.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel6.12-libbpf-static package and not the kernel6.12-libbpf-static package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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 Base Scores

version 3.1