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 432503921D8 for ; Sun, 19 Jul 2026 12:04:26 +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=1784462667; cv=none; b=Gq6WCvkfXY/ArhDpgPVGnxJyEFlhBUgK+FTiNqaSq5QIPN4EahxPmtLzyivzI3SMrPplOccbV+noF3od9O2NJWurfIk5HrMQ00sdTXpBzyD39WwUPfy9BHruC+NkFf8mhFsqFODiOOLKDNNa8kP6V15tJcODKCq5HdTxdONXmXU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784462667; c=relaxed/simple; bh=bgI/YFPPOkw4tdK3N+1ulx4uuXa3oWBWW6TEP/TX0D8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=P7x1J9xkThQf25D520zQ2e6FbZDu7PcAO8v6nRGbqcf4vvzs2rySJ6BqovSCxsKle6Y0bmDDvPps+UBJSYvKPxoLqSUOGfZLO36Dz0cufS4yRjui1L/ZEu9ch+MaXoGDW/26A5PlkEynMrbTPBAdW0EfLDC7AxfOie7aRLWhGMI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mRCPNMbd; 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="mRCPNMbd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A82901F000E9; Sun, 19 Jul 2026 12:04:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784462666; bh=G24G1I0Aiku6pwixDSxSi6eZVFeV2e+Xk4ZJNDX4CrM=; h=From:To:Cc:Subject:Date:Reply-To; b=mRCPNMbd1fc8hV3ndsPkyS+jflgvJOj4roR2s5XqXoYODWR3tQEJHoHeVEGwL4f5M CIzwkK7V1cuhrekBrG6Umd7Ycj64GDtGP/jnTB7+JkAWLFGx4qXQocRdbFDBRokfqj PO7FuK0xpgt0718gcpVicNQ8f6rWDItIWqFzlTIE= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-63832: wifi: mt76: add wcid publish check in mt76_sta_add Date: Sun, 19 Jul 2026 14:02:49 +0200 Message-ID: <2026071908-CVE-2026-63832-d93b@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=2644; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=3KBeD5oThTgiMdwmbk6HQwB3rEbYgquqe6xDIFooEzY=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkxew6sOpe+cztDT9TJQxr/KgsC/j18tFiDQW7Rio6G8 zV9YQtndsSyMAgyMciKKbJ82cZzdH/FIUUvQ9vTMHNYmUCGMHBxCsBE5oowzPc5eVIp7ELB2l/x h6qvT7NxeeCk4s8wP/x92ma2gqUdFzRqP5cI5yiznBS/CAA= 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: add wcid publish check in mt76_sta_add Since mt7925_mac_sta_add publishes wcid, add publish check in mt76_sta_add to avoid reinitializing the wcid->poll_list. Found dev->sta_poll_list corruption when using mt7925 and 7.1-rc4. According to the corruption information, prev->next was changed to itself. wlan0: disconnect from AP 90:fb:5d:94:8b:e3 for new auth to 90:fb:5d:94:8b:e2 wlan0: authenticate with 90:fb:5d:94:8b:e2 (local address=84:9e:56:9c:7e:6b) wlan0: send auth to 90:fb:5d:94:8b:e2 (try 1/3) slab kmalloc-8k start ffff8c80958a6000 pointer offset 4160 size 8192 list_add corruption. prev->next should be next (ffff8c808a7488f8), but was ffff8c80958a7040. (prev=ffff8c80958a7040). mt76_wcid_add_poll+0x95/0xd0 [mt76] mt7925_mac_add_txs.part.0+0xa5/0xe0 [mt7925_common] mt7925_rx_check+0xa7/0xc0 [mt7925_common] mt76_dma_rx_poll+0x50d/0x790 [mt76] mt792x_poll_rx+0x52/0xe0 [mt792x_lib] The Linux kernel CVE team has assigned CVE-2026-63832 to this issue. Affected and fixed versions =========================== Fixed in 6.18.38 with commit 3c499851753a24d2e148d4e9ca51764c0c51554e Fixed in 7.1.3 with commit 55e014aaec650ede08b693ba59c8d0443f13f11c Fixed in 7.2-rc1 with commit 20b126920a259df4d7dcae19fcfe2c57a74d6b2e 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-2026-63832 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/mac80211.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/3c499851753a24d2e148d4e9ca51764c0c51554e https://git.kernel.org/stable/c/55e014aaec650ede08b693ba59c8d0443f13f11c https://git.kernel.org/stable/c/20b126920a259df4d7dcae19fcfe2c57a74d6b2e