Missing Release of Resource after Effective Lifetime Affecting libperf package, versions <0:5.14.0-503.11.1.el9_5


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-RHEL9-LIBPERF-15675972
  • published18 Mar 2026
  • disclosed30 Dec 2025

Introduced: 30 Dec 2025

CVE-2023-54227  (opens in a new tab)
CWE-772  (opens in a new tab)

How to fix?

Upgrade RHEL:9 libperf to version 0:5.14.0-503.11.1.el9_5 or higher.
This issue was patched in RHSA-2024:9315.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libperf package and not the libperf package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

blk-mq: fix tags leak when shrink nr_hw_queues

Although we don't need to realloc set->tags[] when shrink nr_hw_queues, we need to free them. Or these tags will be leaked.

How to reproduce:

  1. mount -t configfs configfs /mnt
  2. modprobe null_blk nr_devices=0 submit_queues=8
  3. mkdir /mnt/nullb/nullb0
  4. echo 1 > /mnt/nullb/nullb0/power
  5. echo 4 > /mnt/nullb/nullb0/submit_queues
  6. rmdir /mnt/nullb/nullb0

In step 4, will alloc 9 tags (8 submit queues and 1 poll queue), then in step 5, new_nr_hw_queues = 5 (4 submit queues and 1 poll queue). At last in step 6, only these 5 tags are freed, the other 4 tags leaked.

CVSS Base Scores

version 3.1