CVE-2026-72032

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

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

hwsbwcmatchermove() allocates a replacement matcher before setting it as the resize target. If mlx5hwsmatcherresizeset_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.