CVE-2026-72032net/mlx5: HWS, fix matcher leak on resize target setup failure
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 2111bb970c787b16b002dc726c1d296ce87a00fb before a751ccdc6ea9bde154f25a5ba66926f462f96c19; 2111bb970c787b16b002dc726c1d296ce87a00fb builds before 1dce4f4bb3c1c02080b1a45bdd2abb2913a6642a; from 2111bb970c787b16b002dc726c1d296ce87a00fb before ae0265f0a95aaacef59d560a3e1ea36db8be9a52; from 2111bb970c787b16b002dc726c1d296ce87a00fb before bb09d0e64ecaa0aa0f7d1133a1696ed74dead295 | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.