Improper Check or Handling of Exceptional Conditions Affecting kernel-debuginfo-common-x86_64 package, versions <0:6.1.132-147.221.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (17th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELDEBUGINFOCOMMONX8664-10496925
  • published24 Jun 2025
  • disclosed1 Apr 2025

Introduced: 1 Apr 2025

CVE-2025-21971  (opens in a new tab)
CWE-703  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-debuginfo-common-x86_64 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-common-x86_64 package and not the kernel-debuginfo-common-x86_64 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: Prevent creation of classes with TC_H_ROOT

The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created with classid TC_H_ROOT, the traversal terminates prematurely at this class instead of reaching the actual root qdisc, causing parent statistics to be incorrectly maintained. In case of DRR, this could lead to a crash as reported by Mingi Cho.

Prevent the creation of any Qdisc class with classid TC_H_ROOT (0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

CVSS Base Scores

version 3.1