Improperly Implemented Security Check for Standard Affecting kernel6.12-libbpf-devel package, versions <1:6.12.64-87.122.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL612LIBBPFDEVEL-15317841
  • published19 Feb 2026
  • disclosed13 Jan 2026

Introduced: 13 Jan 2026

CVE-2025-68803  (opens in a new tab)
CWE-358  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel6.12-libbpf-devel to version 1:6.12.64-87.122.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1423.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel6.12-libbpf-devel package and not the kernel6.12-libbpf-devel 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:

NFSD: NFSv4 file creation neglects setting ACL

An NFSv4 client that sets an ACL with a named principal during file creation retrieves the ACL afterwards, and finds that it is only a default ACL (based on the mode bits) and not the ACL that was requested during file creation. This violates RFC 8881 section 6.4.1.3: "the ACL attribute is set as given".

The issue occurs in nfsd_create_setattr(), which calls nfsd_attrs_valid() to determine whether to call nfsd_setattr(). However, nfsd_attrs_valid() checks only for iattr changes and security labels, but not POSIX ACLs. When only an ACL is present, the function returns false, nfsd_setattr() is skipped, and the POSIX ACL is never applied to the inode.

Subsequently, when the client retrieves the ACL, the server finds no POSIX ACL on the inode and returns one generated from the file's mode bits rather than returning the originally-specified ACL.

CVSS Base Scores

version 3.1