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wifi: cfg80211: use wiphy work for socket owner autodisconnect

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: use wiphy work for socket owner autodisconnect nl80211_netlink_notify() walks the cfg80211 wireless device list when a NETLINK_GENERIC socket is released. If the socket owns a connection, the notifier queues the embedded wdev->disconnect_wk work item. That work is a plain work_struct today. NETDEV_GOING_DOWN cancels it, but a NETLINK_URELEASE notifier that already observed conn_owner_nlportid can queue it after that cancel returns. _cfg80211_unregister_wdev() then removes the wdev from the list and waits for RCU readers, but synchronize_net() does not drain work queued by such a reader. Make the autodisconnect work a wiphy_work instead. The callback already needs the wiphy mutex, and wiphy_work runs under that mutex. This lets teardown cancel pending autodisconnect work while holding the mutex, without a cancel_work_sync() vs. worker locking concern. Also cancel the wiphy work after list_del_rcu() and synchronize_net(). Any NETLINK_URELEASE notifier that had already reached the wdev list has then either queued the work and it is removed, or can no longer find the wdev.

Announced Source revision 1
Original source ↗

CVE-2026-68404

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-2026-68404

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": "bd2522b168847106c1885f0319a2833bdf88bf9a",
        "lessThan": "c55590e4c69e0fd194df6d20bc35381c201d99e1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd2522b168847106c1885f0319a2833bdf88bf9a",
        "lessThan": "4087a9ba4ece70297a4174afaa41c0b700302b65",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd2522b168847106c1885f0319a2833bdf88bf9a",
        "lessThan": "c2ddd180bbee766cf7359473d623423ea9485d93",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd2522b168847106c1885f0319a2833bdf88bf9a",
        "lessThan": "6d6123fef5a4af175cc6b6b12a03dd0f3c240b79",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd2522b168847106c1885f0319a2833bdf88bf9a",
        "lessThan": "0c2ed186bbe14304415476d6707b747dddcd8583",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "include/net/cfg80211.h",
      "net/wireless/core.c",
      "net/wireless/core.h",
      "net/wireless/nl80211.c",
      "net/wireless/sme.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.11",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.114",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.57",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "include/net/cfg80211.h",
      "net/wireless/core.c",
      "net/wireless/core.h",
      "net/wireless/nl80211.c",
      "net/wireless/sme.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68404

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#46472 · Revision 1
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Publisher date
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