FKIE_CVE-2026-72004

Vulnerability from fkie_nvd - Published: 2026-08-15 06:20 - Updated: 2026-08-17 06:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix memory leak in ieee80211_register_hw() If kmemdup() fails while copying supported band structures, the error path jumps to fail_rate. This skips rate_control_deinitialize() and leaks the initialized local->rate_ctrl. Fix this by adding a fail_band label that shares the rate-control cleanup path before falling through to the remaining teardown. 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-rc7. An x86_64 allyesconfig build showed no new warnings. As we do not have a suitable mac80211 device/driver combination to test with, no runtime testing was able to be performed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8ba
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1daf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f01eec75fd372961550b928902f3a2c11fca1daf",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "3d8b9b290421c3cd505fcd2f551f143f8142786a",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "08b71bd92317f99642b842cfc0d30200868162fc",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "a02b52fe54f7b5107aefa1ce28c2f69749c57616",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "45e9ac538cdff7bce656d731114a64eda85af0d7",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "bdc0b8bfdc142439d6708b072e8159eb515ee7b0",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "a7584f261e64fe14e45bdf70f343e16c1ee3a037",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            },
            {
              "lessThan": "95fc02722edde02946d0d475221f2b2054d3d8ba",
              "status": "affected",
              "version": "09b4a4faf9d037990ac4f8110dd944b27b42d5df",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix memory leak in ieee80211_register_hw()\n\nIf kmemdup() fails while copying supported band structures, the error\npath jumps to fail_rate. This skips rate_control_deinitialize() and\nleaks the initialized local-\u003erate_ctrl.\n\nFix this by adding a fail_band label that shares the rate-control cleanup\npath before falling through to the remaining teardown.\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 present in\nv7.1-rc7.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have a\nsuitable mac80211 device/driver combination to test with, no runtime\ntesting was able to be performed."
    }
  ],
  "id": "CVE-2026-72004",
  "lastModified": "2026-08-17T06:17:57.830",
  "metrics": {},
  "published": "2026-08-15T06:20:58.987",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8ba"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1daf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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