From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 865173375C3 for ; Sat, 15 Aug 2026 06:05:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786773958; cv=none; b=oLzkc0VkoQmXVonLO9qOneMlbxcBdcq+Qssh/GsWrdS4wWS22USA5vutPVy/Bm/Wrp59c62Z+fP8NKsU1p0+JzgkqIZq9iwF1mJJV9+Ljqc1k7rt82rVEq3LZ577AIRU9G39nVOYbsQ1MPa6PkR3GKxYayElbsr6+oDCeS5kTA8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786773958; c=relaxed/simple; bh=XuMxZvVdtaUu7jn4vDOFW07ZiQw+peG57YpIMoqLGdw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=rrrbuTs2yTTZJsIrMBmWi7hcORaNBMr4vn3VciSDBQGHQrKysx+1nOXeRxF1f7QgjUOJnkFHBrRmzTWttsrSINqJKJ+AePt3ngxqBl0ieT4pl40/pKK0JgrmlJcFC39Dv/T7Lgx4BdljRZZ6NNh2D7Zza9iDg6glpDowkMJ66iQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UQT5Y371; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UQT5Y371" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8700A1F000E9; Sat, 15 Aug 2026 06:05:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786773957; bh=Z5CPkJreucPpOoq9Zw4EEKIBI2bQd80m6xUVV7BN40I=; h=From:To:Cc:Subject:Date:Reply-To; b=UQT5Y371j6IdP/xwFpbKMTx+orNpqrj72RMYs2VEnFAv1QWuGipYk9Y70WMiO0gsp CZysFFxuINNq7cdj0Yfyz5slf21jeo2911D9LdM9PqdQ90UXQUbHQDPzQK3+M7ZTsn YeFjkKwJZ6NMdOWSxx7XDOrSFtQfWrFKm+i6vNvc= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-68470: wifi: mac80211: validate extension-frame layout before RX Date: Sat, 15 Aug 2026 15:01:12 +0900 Message-ID: <2026081504-CVE-2026-68470-1fbf@gregkh> X-Mailer: git-send-email 2.55.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2769; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=jlhSlN3iEpZ2n66kyJSRDnPZpO0ER84u2OGPtDUARog=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkNDAv6TO/OmWa8+6eI//MPys5PTO73yaimhSmJ1Pg/F excoG3aEcvCIMjEICumyPJlG8/R/RWHFL0MbU/DzGFlAhnCwMUpABO5ncCwoMf6XopZYK6kgNs1 az1/hZPb3tvbMszhvqBR+8sjVLfygLH9zewJS45Pso8HAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: validate extension-frame layout before RX Extension frames only have the extension header at the regular 802.11 header offset. The generic RX path can still reach helpers and interface dispatch code that read regular header address fields before unsupported extension subtypes are dropped. mac80211 currently only handles S1G beacon extension frames. Drop other extension subtypes before they can reach regular-header RX processing. For S1G beacons, linearize the SKB with the management-frame path and require the fixed S1G beacon header, including optional fixed fields indicated by frame control, before generic RX dispatch. Route S1G beacons through the station/default-link RX path without regular-header station lookup. Avoid regular-header address reads in the mac80211 RX paths that process S1G extension beacons, including accept-frame, duplicate-detection, address-copy, and MLO address-translation paths. Also make ieee80211_get_bssid() length-safe before returning the S1G source-address pointer. The Linux kernel CVE team has assigned CVE-2026-68470 to this issue. Affected and fixed versions =========================== Issue introduced in 5.10 with commit 09a740ce352e1a1d16b9984115514ba9a4f4704b and fixed in 7.1.5 with commit 625fc704b19cb48d7d269ad54ffffb4d3bf9c7ed Issue introduced in 5.10 with commit 09a740ce352e1a1d16b9984115514ba9a4f4704b and fixed in 7.2-rc4 with commit 57d503ce32eccfa7650065ca4c560f7e29a2e676 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-68470 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/mac80211/rx.c net/mac80211/util.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/625fc704b19cb48d7d269ad54ffffb4d3bf9c7ed https://git.kernel.org/stable/c/57d503ce32eccfa7650065ca4c560f7e29a2e676