Improper Validation of Array Index Affecting kernel6.12-modules-extra package, versions <1:6.12.46-66.121.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL612MODULESEXTRA-13166241
  • published1 Oct 2025
  • disclosed19 Aug 2025

Introduced: 19 Aug 2025

CVE-2025-38568  (opens in a new tab)
CWE-129  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel6.12-modules-extra to version 1:6.12.46-66.121.amzn2023 or higher.
This issue was patched in ALAS2023-2025-1208.

NVD Description

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

net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing

TCA_MQPRIO_TC_ENTRY_INDEX is validated using NLA_POLICY_MAX(NLA_U32, TC_QOPT_MAX_QUEUE), which allows the value TC_QOPT_MAX_QUEUE (16). This leads to a 4-byte out-of-bounds stack write in the fp[] array, which only has room for 16 elements (0–15).

Fix this by changing the policy to allow only up to TC_QOPT_MAX_QUEUE - 1.

CVSS Base Scores

version 3.1