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 686595540A1 for ; Fri, 11 Sep 2026 19:46:57 +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=1789156021; cv=none; b=dMxs4Egt03Q2fMobzAN8jtlWuQ/rmTkS6G9yG/ZXWt3Sf+JTJXhPp9wguLtz8DjMO8sDmsU7ttT/j5ILSYyqRmrg09PsnqyQ58SNRrUBtfbJzwVNj4CPDHsLEJNAOmiZ8x61fjgs2oeaF/nWaKocyBhATA0zPDBBiwyPaatb+tI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789156021; c=relaxed/simple; bh=lp/tpQ16vl3sk8a1VbJf+g0IcRfM1K0+EczdXT/FJF4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=AcI7rkJZTEpSjMN2UrlIjnysidsUfYSVHRdbpxpFD/KUL7K2gMjVIuHzGEu4MdLQAAXI0NUvgvzsSFPQiWtCeIZ+tINQD7/qS1rqtEw5jJNFUEDxZEB8bX8xN41HDDH29/yuL/K8dJrdeLx8Jm4Z626P/QBu0MxZG2rn+Apm+qg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tnzuDgky; 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="tnzuDgky" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CEBF1F00899; Fri, 11 Sep 2026 19:46:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789156017; bh=iv3iC51UDA6VrBI2RGvIUwCTh//B74B9n7OI4bJ2q3E=; h=From:To:Cc:Subject:Date:Reply-To; b=tnzuDgkyUhlxnFw0ZOBzlt9y6fx/cnV/65hiuALAptknUX8ZLH/EV/2tIkoV/IIJt zWaEwXq683mU65htNHhF+jO12tjwngtPniWoEjJDNH7B7Pc0BttNgCyxyu1M8grAy/ RiD4A3e1AOu7T/TE4b1QTmgcOz3bf/P2mxnHforw= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80935: wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy Date: Fri, 11 Sep 2026 21:40:41 +0200 Message-ID: <2026091136-CVE-2026-80935-3594@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=2411; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=c0ZtoEF052CTyWBtBjgasjeUrI0tJx87xkbIQYTbeME=; b=owGbwMvMwCRo6H6F97bub03G02pJDFlLIk0+qnEWShm5Prgfv2dzjtfOz5fKi/YXPha+EaMRY aq1zX9mRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExksRTDgrUdS+4f/Lsh7tSh OdK7HvUne3sePcww3+uc7uN/Xw03zftx/MTH3ZfTfVTrHAA= 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: mt76: mt7996: bound the device EEPROM address before the EFUSE copy mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block copy from the address reported by the MCU response (event->addr, a device-controlled __le32) and clamps only the copy length, never the destination offset into dev->mt76.eeprom.data. A malicious or malfunctioning device can report an arbitrary address and drive an out-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past eeprom.data. Reject a response whose address would place the copy outside eeprom.data before deriving the destination pointer. Devices that echo the requested in-bounds offset are unaffected. The Linux kernel CVE team has assigned CVE-2026-80935 to this issue. Affected and fixed versions =========================== Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 7.2.4 with commit 6be59da2063d5b3522bfde8aae0487ec095eb384 Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 7.3-rc1 with commit 13b3c29a782033ce4a230be9e5618032813dbcd4 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-2026-80935 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/wireless/mediatek/mt76/mt7996/mcu.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/6be59da2063d5b3522bfde8aae0487ec095eb384 https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4