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wifi: mac80211_hwsim: avoid NULL skb in stop queue drain

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: avoid NULL skb in stop queue drain mac80211_hwsim_stop() drops any frames left in data->pending. The loop currently checks skb_queue_empty() and then dequeues separately. That split is racy with TX status handling, which can remove a pending frame under the queue lock. If the last entry is removed after the empty check, skb_dequeue() returns NULL and the stop path passes that NULL skb to ieee80211_free_txskb(). Use skb_dequeue() as the loop condition instead. The dequeue result is the object that stop owns and frees, and a concurrent status completion that empties the queue simply makes the loop terminate.

Announced Group revision 1
Original source ↗

CVE-2026-93149

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-2026-93149

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": "bd18de517923903a177508fc8813f44e717b1c00",
        "lessThan": "d131027054a8dd922dda01fe8d381abe5af4970b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd18de517923903a177508fc8813f44e717b1c00",
        "lessThan": "c40ba47f2ba1951cb32ea048667ed014d36a5749",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd18de517923903a177508fc8813f44e717b1c00",
        "lessThan": "2817431a61557f46dc63077b7cc126bc906c242e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd18de517923903a177508fc8813f44e717b1c00",
        "lessThan": "e7fccad2c8e6ef6bbafe509c95869d161d0f466b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd18de517923903a177508fc8813f44e717b1c00",
        "lessThan": "1c2a4ab6efa26415dd131b8c222e7893fda03435",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "bd18de517923903a177508fc8813f44e717b1c00",
        "lessThan": "158438cd6ad69d6dd7d871582c38baf22169fede",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "78bf3c6131488b00386acd9aff1ea4e6c44fa38e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a9028333001f793b2724e8be42fce3336de2cf1c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7019c9f385b264a2d6f685028268422d55087e37",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.4.129",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.10.47",
        "lessThan": "5.11",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.12.14",
        "lessThan": "5.13",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/virtual/mac80211_hwsim_main.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93149

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#37867 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-93149 · Revision 1Source updated