wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure_CVE-2026-23444

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure\n\nieee80211_tx_prepare_skb() has three error paths, but only two of them\nfree the skb. The first error path (ieee80211_tx_prepare() returning\nTX_DROP) does not free it, while invoke_tx_handlers() failure and the\nfragmentation check both do.\n\nAdd kfree_skb() to the first error path so all three are consistent,\nand remove the now-redundant frees in callers (ath9k, mt76,\nmac80211_hwsim) to avoid double-free.\n\nDocument the skb ownership guarantee in the function's kdoc.",
    "published": "2026-04-03T15:15:28.464Z",
    "modified": "2026-04-27T14:02:26.358Z",
    "type": "cve",
    "title": "wifi: mac80211: always free skb on ieee80211_tx_prepare_skb() failure",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/f77b51bcee7be2bb686b5f7a2d4a1921e4bdb9f4\nhttps://git.kernel.org/stable/c/3b4d27acafaeab478fd24f79ad6e593a892828b9\nhttps://git.kernel.org/stable/c/06e769dddcbeb3baf2ce346273b53dd61fdbecf4\nhttps://git.kernel.org/stable/c/50f1b690b4868923fbd242298def2fb88662f108\nhttps://git.kernel.org/stable/c/d5ad6ab61cbd89afdb60881f6274f74328af3ee9",
    "id": "CVE-2026-23444",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 06be6b149f7e406bcf16098567f5a6c9f042bced\nLinux Linux 06be6b149f7e406bcf16098567f5a6c9f042bced\nLinux Linux 06be6b149f7e406bcf16098567f5a6c9f042bced\nLinux Linux 06be6b149f7e406bcf16098567f5a6c9f042bced\nLinux Linux 06be6b149f7e406bcf16098567f5a6c9f042bced\nLinux Linux 3.13",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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            "privilegesRequired": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "06be6b149f7e406bcf16098567f5a6c9f042bced",
    "vendor": "Linux",
    "ai_description": "",
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    "ai_score": 0
}