Use of a Non-reentrant Function in a Concurrent Context Affecting perf-debuginfo package, versions <1:6.1.164-196.303.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.01% (4th percentile)

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  • Snyk IDSNYK-AMZN2023-PERFDEBUGINFO-15848917
  • published30 Mar 2026
  • disclosed18 Feb 2026

Introduced: 18 Feb 2026

CVE-2026-23221  (opens in a new tab)
CWE-663  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perf-debuginfo to version 1:6.1.164-196.303.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1491.

NVD Description

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

bus: fsl-mc: fix use-after-free in driver_override_show()

The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock.

This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function.

Fix this by holding the device_lock around the read operation.

CVSS Base Scores

version 3.1