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

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-72032

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:CVE-2026-72032

Kernel

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
6.12.101

Source reference: /affected/1/ranges

6.18.40

Source reference: /affected/1/ranges

7.1.5

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
        "type": "GIT",
        "events": [
          {
            "introduced": "2111bb970c787b16b002dc726c1d296ce87a00fb"
          },
          {
            "fixed": "a751ccdc6ea9bde154f25a5ba66926f462f96c19"
          },
          {
            "fixed": "1dce4f4bb3c1c02080b1a45bdd2abb2913a6642a"
          },
          {
            "fixed": "ae0265f0a95aaacef59d560a3e1ea36db8be9a52"
          },
          {
            "fixed": "bb09d0e64ecaa0aa0f7d1133a1696ed74dead295"
          }
        ]
      }
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72032.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.12.0"
          },
          {
            "fixed": "6.12.101"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.13.0"
          },
          {
            "fixed": "6.18.40"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.19.0"
          },
          {
            "fixed": "7.1.5"
          }
        ]
      }
    ],
    "package": {
      "name": "Kernel",
      "ecosystem": "Linux"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72032.json"
    }
  }
]
Related CVEs
CVE-2026-72032

Source reference: /id

Publisher severity

No explicit severity was provided.

Event
#50791 · Revision 1
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Publisher date
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