CVE-2025-40202 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
0.03% (7th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL612LIBBPFSTATIC-14432760
  • published17 Dec 2025
  • disclosed12 Nov 2025

Introduced: 12 Nov 2025

CVE-2025-40202  (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:

ipmi: Rework user message limit handling

The limit on the number of user messages had a number of issues, improper counting in some cases and a use after free.

Restructure how this is all done to handle more in the receive message allocation routine, so all refcouting and user message limit counts are done in that routine. It's a lot cleaner and safer.

CVSS Base Scores

version 3.1