CVE-2026-72004 (GCVE-0-2026-72004)
Vulnerability from cvelistv5
Published
2026-08-15 05:51
Modified
2026-08-17 05:06
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
Impacted products
Vendor Product Version
Linux Linux Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
Version: 09b4a4faf9d037990ac4f8110dd944b27b42d5df
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:06:25.480Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f01eec75fd372961550b928902f3a2c11fca1daf"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d8b9b290421c3cd505fcd2f551f143f8142786a"
        },
        {
          "url": "https://git.kernel.org/stable/c/08b71bd92317f99642b842cfc0d30200868162fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/a02b52fe54f7b5107aefa1ce28c2f69749c57616"
        },
        {
          "url": "https://git.kernel.org/stable/c/45e9ac538cdff7bce656d731114a64eda85af0d7"
        },
        {
          "url": "https://git.kernel.org/stable/c/bdc0b8bfdc142439d6708b072e8159eb515ee7b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/a7584f261e64fe14e45bdf70f343e16c1ee3a037"
        },
        {
          "url": "https://git.kernel.org/stable/c/95fc02722edde02946d0d475221f2b2054d3d8ba"
        }
      ],
      "title": "wifi: mac80211: fix memory leak in ieee80211_register_hw()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72004",
    "datePublished": "2026-08-15T05:51:35.363Z",
    "dateReserved": "2026-08-09T03:40:39.898Z",
    "dateUpdated": "2026-08-17T05:06:25.480Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.