NULL Pointer Dereference Affecting kernel-debuginfo package, versions <0:6.1.132-147.221.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELDEBUGINFO-10339294
  • published11 Jun 2025
  • disclosed1 Apr 2025

Introduced: 1 Apr 2025

CVE-2025-21980  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-debuginfo to version 0:6.1.132-147.221.amzn2023 or higher.
This issue was patched in ALAS2023-2025-959.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo package and not the kernel-debuginfo 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:

sched: address a potential NULL pointer dereference in the GRED scheduler.

If kzalloc in gred_init returns a NULL pointer, the code follows the error handling path, invoking gred_destroy. This, in turn, calls gred_offload, where memset could receive a NULL pointer as input, potentially leading to a kernel crash.

When table->opt is NULL in gred_init(), gred_change_table_def() is not called yet, so it is not necessary to call ->ndo_setup_tc() in gred_offload().

CVSS Base Scores

version 3.1