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

Type: advisorySource: Official CVE List1 source record

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().

Announced Source revision 1
Original source ↗

CVE-2026-46180

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: cve:CVE-2026-46180

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "a21f735fb1017ef89c6f9dbf4d799513b4e7bd5a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "df2e90d6a9955510f24f1dada78cfc439fd9fa88",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "d616bb10de79e5c2bd8a24230a1128aeaf715615",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "ed4168d1a50fef5be8eca947fbbf05a28507d265",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "d16827cb1d3936f7627d0da6044483f743ebde03",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "658d2e46c2e9a8eb9b80c5e803ce3c89885b3366",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "908b92231e1ded53e43fcfad5e0704d83e1b803c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9ffda88be7416b8336f644806c2b3ed3ce08b26",
        "lessThan": "c623b63580880cc742255eaed3d79804c1b91143",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.3",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.259",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.210",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.176",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.88",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.30",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46180

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28405 · Revision 1
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Publisher date
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