Vulnerability-Lookup

GHSA-JMX9-9WWR-M2R4

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task

Watchdog task might end between send_sig() and kthread_stop() calls, what results in the use-after-free issue. Fix this by increasing watchdog task reference count before calling send_sig() and dropping it by switching to kthread_stop_put().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46180"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task\n\nWatchdog task might end between send_sig() and kthread_stop() calls, what\nresults in the use-after-free issue. Fix this by increasing watchdog task\nreference count before calling send_sig() and dropping it by switching to\nkthread_stop_put().",
  "id": "GHSA-jmx9-9wwr-m2r4",
  "modified": "2026-05-28T12:30:32Z",
  "published": "2026-05-28T12:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46180"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/908b92231e1ded53e43fcfad5e0704d83e1b803c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c623b63580880cc742255eaed3d79804c1b91143"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d16827cb1d3936f7627d0da6044483f743ebde03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed4168d1a50fef5be8eca947fbbf05a28507d265"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46180 (GCVE-0-2026-46180)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36

Title

wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task Watchdog task might end between send_sig() and kthread_stop() calls, what results in the use-after-free issue. Fix this by increasing watchdog task reference count before calling send_sig() and dropping it by switching to kthread_stop_put().

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/ed4168d1a50fef5be…
https://git.kernel.org/stable/c/d16827cb1d3936f76…
https://git.kernel.org/stable/c/658d2e46c2e9a8eb9…
https://git.kernel.org/stable/c/908b92231e1ded53e…
https://git.kernel.org/stable/c/c623b63580880cc74…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a9ffda88be7416b8336f644806c2b3ed3ce08b26 , < ed4168d1a50fef5be8eca947fbbf05a28507d265 (git) Affected: a9ffda88be7416b8336f644806c2b3ed3ce08b26 , < d16827cb1d3936f7627d0da6044483f743ebde03 (git) Affected: a9ffda88be7416b8336f644806c2b3ed3ce08b26 , < 658d2e46c2e9a8eb9b80c5e803ce3c89885b3366 (git) Affected: a9ffda88be7416b8336f644806c2b3ed3ce08b26 , < 908b92231e1ded53e43fcfad5e0704d83e1b803c (git) Affected: a9ffda88be7416b8336f644806c2b3ed3ce08b26 , < c623b63580880cc742255eaed3d79804c1b91143 (git)
Linux	Linux	Affected: 3.3 Unaffected: 0 , < 3.3 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ed4168d1a50fef5be8eca947fbbf05a28507d265",
              "status": "affected",
              "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
              "versionType": "git"
            },
            {
              "lessThan": "d16827cb1d3936f7627d0da6044483f743ebde03",
              "status": "affected",
              "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
              "versionType": "git"
            },
            {
              "lessThan": "658d2e46c2e9a8eb9b80c5e803ce3c89885b3366",
              "status": "affected",
              "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
              "versionType": "git"
            },
            {
              "lessThan": "908b92231e1ded53e43fcfad5e0704d83e1b803c",
              "status": "affected",
              "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
              "versionType": "git"
            },
            {
              "lessThan": "c623b63580880cc742255eaed3d79804c1b91143",
              "status": "affected",
              "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.3"
            },
            {
              "lessThan": "3.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.88",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "3.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.88",
                  "versionStartIncluding": "3.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                }
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              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task\n\nWatchdog task might end between send_sig() and kthread_stop() calls, what\nresults in the use-after-free issue. Fix this by increasing watchdog task\nreference count before calling send_sig() and dropping it by switching to\nkthread_stop_put()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:36:33.904Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ed4168d1a50fef5be8eca947fbbf05a28507d265"
        },
        {
          "url": "https://git.kernel.org/stable/c/d16827cb1d3936f7627d0da6044483f743ebde03"
        },
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          "url": "https://git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366"
        },
        {
          "url": "https://git.kernel.org/stable/c/908b92231e1ded53e43fcfad5e0704d83e1b803c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c623b63580880cc742255eaed3d79804c1b91143"
        }
      ],
      "title": "wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46180",
    "datePublished": "2026-05-28T09:36:33.904Z",
    "dateReserved": "2026-05-13T15:03:33.103Z",
    "dateUpdated": "2026-05-28T09:36:33.904Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-JMX9-9WWR-M2R4

CVE-2026-46180 (GCVE-0-2026-46180)

Tags

Sightings

Nomenclature