Riskcovery

CVE-2026-72032

net/mlx5: HWS, fix matcher leak on resize target setup failure

State
Published
Severity
Not scored
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

Description

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

net/mlx5: HWS, fix matcher leak on resize target setup failure

hws_bwc_matcher_move() allocates a replacement matcher before setting it as the resize target. If mlx5hws_matcher_resize_set_target() fails, the replacement matcher is not attached anywhere and is leaked.

Fix the leak by destroying the replacement matcher before returning from the resize-target failure path.

The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1.

An x86_64 allyesconfig build showed no new warnings. As we do not have a mlx5 HWS-capable device to test with, no runtime testing was able to be performed.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 2111bb970c787b16b002dc726c1d296ce87a00fb to before a751ccdc6ea9bde154f25a5ba66926f462f96c19Affected
  • 2111bb970c787b16b002dc726c1d296ce87a00fb to before 1dce4f4bb3c1c02080b1a45bdd2abb2913a6642aAffected
  • 2111bb970c787b16b002dc726c1d296ce87a00fb to before ae0265f0a95aaacef59d560a3e1ea36db8be9a52Affected
  • 2111bb970c787b16b002dc726c1d296ce87a00fb to before bb09d0e64ecaa0aa0f7d1133a1696ed74dead295Affected
LinuxLinux
  • 6.12Affected
  • before 6.12Not affected
  • 6.12.101 through 6.12.*Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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