CVE-2026-72032

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/a751ccdc6ea9bde154f25a5ba66926f462f96c19 ↗
• https://git.kernel.org/stable/c/1dce4f4bb3c1c02080b1a45bdd2abb2913a6642a ↗
• https://git.kernel.org/stable/c/ae0265f0a95aaacef59d560a3e1ea36db8be9a52 ↗
• https://git.kernel.org/stable/c/bb09d0e64ecaa0aa0f7d1133a1696ed74dead295 ↗