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 8E34A37F32B for ; Sat, 15 Aug 2026 06:31:53 +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=1786775514; cv=none; b=IeZZeDew0CwcsFa1vvPuKPkIBmZxWYZXRrI1VYER0hNS7yyLsUNBeuT62FcSaPJuRJgFA1bA3uOHtqBoPGcYeHr66RChEbBP34l66NmsJTUeBWfMpE4fPjfUgerT8Qr2sDi2akrbOlxpvoELCrUK49fUUWy4wECrzg4N+ga+Qh8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786775514; c=relaxed/simple; bh=Q7JZhky8FadMNA5HeP04zIfQIRbvNiizVwGxW3vK5iA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=mehQg/AsYIHZ4PL0WAkIv9vPy5uWcW9MbKk1LGiRqzPEH8J9F0jGcQCa5qn+yBrSGiu+JZ3Mma4e3YeXe53RsSlyODr/INZ8lD0U52d/wcI7N9mi7nXZ5/z8K6OpNu1wci37ud6wmluWkBu0B5JY1I0KSxIoLN2tgjvs2yqa6CA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PVbkJVU3; 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="PVbkJVU3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC09E1F000E9; Sat, 15 Aug 2026 06:31:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786775513; bh=UNy128r7Z7ISXYVIXL0wAa/WWwcLvOvtWRzM8Y7mFPw=; h=From:To:Cc:Subject:Date:Reply-To; b=PVbkJVU3bddRQjJzpzA12SIhRmqXalijKATUSUdxHoY655JGve8G2KrPI5hThata1 hrcRhFE+HE0NSCgDZvK9alHgZ3LBznuiu1t480eB849dc3xiEm2xxF+2of6jqtiGGr 9ilBW1TlSAu8e/lFyOoVn4luEqGk4XSgbLJBA9sI= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-74263: net: wwan: t7xx: check skb_clone in control TX Date: Sat, 15 Aug 2026 15:09:50 +0900 Message-ID: <2026081542-CVE-2026-74263-6a02@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=2844; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=VzhXaLg/wTMsHSHe0xGW5TKrc0+seaivJ/alEppy5y4=; b=kA0DAAIRMUfUDdst+ykByyZiAGqAAQLIGg1fKej4tMNf69uwuuowOeCG+ZvN4lZaV6A7Kkuuv IhdBAARAgAdFiEE9LYMxb94wiFKMT3LMUfUDdst+ykFAmqAAQIACgkQMUfUDdst+yluoACeNvR7 w5aF07yAMLvBHvQ5os52iygAnise7LbExGkGjl67MkSQ5qHfOrkI 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: net: wwan: t7xx: check skb_clone in control TX t7xx_port_ctrl_tx() clones each skb fragment before passing it to the port transmit path. The clone is used immediately to set cloned->len, so an skb_clone() failure results in a NULL pointer dereference. Check the clone before using it. If previous fragments were already queued, preserve the driver's existing partial-write behavior by returning the number of bytes submitted so far. The Linux kernel CVE team has assigned CVE-2026-74263 to this issue. Affected and fixed versions =========================== Issue introduced in 6.4 with commit 36bd28c1cb0dbf48645cfe43159907fb3253b33a and fixed in 6.6.145 with commit 7edd4db82f9429591de10be4c904c817f12ba029 Issue introduced in 6.4 with commit 36bd28c1cb0dbf48645cfe43159907fb3253b33a and fixed in 6.12.97 with commit 112490467586146d323cb7230b1d72137e36900c Issue introduced in 6.4 with commit 36bd28c1cb0dbf48645cfe43159907fb3253b33a and fixed in 6.18.40 with commit f7aebaee2961bfcb86f282202d3dbd9b69db1a7c Issue introduced in 6.4 with commit 36bd28c1cb0dbf48645cfe43159907fb3253b33a and fixed in 7.1.5 with commit 4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095 Issue introduced in 6.4 with commit 36bd28c1cb0dbf48645cfe43159907fb3253b33a and fixed in 7.2-rc1 with commit 05f789fa90d95d5771230e78453cedff2486039d 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-2026-74263 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: drivers/net/wwan/t7xx/t7xx_port_wwan.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/7edd4db82f9429591de10be4c904c817f12ba029 https://git.kernel.org/stable/c/112490467586146d323cb7230b1d72137e36900c https://git.kernel.org/stable/c/f7aebaee2961bfcb86f282202d3dbd9b69db1a7c https://git.kernel.org/stable/c/4c1b25d85f4c9a0f85f3f8c39988ad266a3f3095 https://git.kernel.org/stable/c/05f789fa90d95d5771230e78453cedff2486039d