GHSA-J7XX-3C7M-PGH9

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72032"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:12Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, fix matcher leak on resize target setup failure\n\nhws_bwc_matcher_move() allocates a replacement matcher before setting it\nas the resize target. If mlx5hws_matcher_resize_set_target() fails, the\nreplacement matcher is not attached anywhere and is leaked.\n\nFix the leak by destroying the replacement matcher before returning from\nthe resize-target failure path.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1.1.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have a\nmlx5 HWS-capable device to test with, no runtime testing was able to be\nperformed.",
  "id": "GHSA-j7xx-3c7m-pgh9",
  "modified": "2026-08-15T06:32:10Z",
  "published": "2026-08-15T06:32:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72032"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1dce4f4bb3c1c02080b1a45bdd2abb2913a6642a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a751ccdc6ea9bde154f25a5ba66926f462f96c19"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae0265f0a95aaacef59d560a3e1ea36db8be9a52"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb09d0e64ecaa0aa0f7d1133a1696ed74dead295"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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