From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1162C359FBE; Fri, 9 Jan 2026 12:25:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767961507; cv=none; b=NG7/7jtLYmq6/mTpF8e9OZNM4QUhWeB2fjY/nV2nUxZD1DrY1Q87ifFIMDm7NP8eZcDPJeWAc4p3+g04EyAmCqmuPJQObxj77mXeNQPW6X/LVAuZp3+GYvk3XrDmiuOkoiYMKz8GX9hD8SNLSmDvInB/XwLRlDGeFrKBZqg0kbk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767961507; c=relaxed/simple; bh=gijgAIR+hv3DghbcCor7k0gtwfAMPR5H0Ks2t9pfVzQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iXPToLiRgzpdOBBHDGLiLSU8DIo4N0qZknERf+FOc89uePOk9slXFhphSA9JMMD4kz+K5ZtBQ9gALgkcOTY2Bi4s3Dv85eox3z8zzyNlWUBS9jzXYep/vXz9KGbg5EoSvCgxJ6DSbSqGsTvQE8Bkyw3MjBJb2TcwtiY4bhlGdZc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=gcGq4VCc; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="gcGq4VCc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7FA28C4CEF1; Fri, 9 Jan 2026 12:25:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767961506; bh=gijgAIR+hv3DghbcCor7k0gtwfAMPR5H0Ks2t9pfVzQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gcGq4VCc06e3AjpVnuyzxPe/bi8RYLq0seNIBMV4qTtKzrET2o4RosZ2b85F2TcP9 VStjRquBjeSbENXsbal66xXOYbOCqEY86mNYv12kpUqgkMeHClGuYMhYGdE6JCUGCD mTj/e/8h2p0NWlkgT4ZKBkNq0nkNd1xXW/CCXqSU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Navaneeth K , stable Subject: [PATCH 6.1 039/634] staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing Date: Fri, 9 Jan 2026 12:35:17 +0100 Message-ID: <20260109112118.918680616@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260109112117.407257400@linuxfoundation.org> References: <20260109112117.407257400@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Navaneeth K commit 6ef0e1c10455927867cac8f0ed6b49f328f8cf95 upstream. The Supported Rates IE length from an incoming Association Request frame was used directly as the memcpy() length when copying into a fixed-size 16-byte stack buffer (supportRate). A malicious station can advertise an IE length larger than 16 bytes, causing a stack buffer overflow. Clamp ie_len to the buffer size before copying the Supported Rates IE, and correct the bounds check when merging Extended Supported Rates to prevent a second potential overflow. This prevents kernel stack corruption triggered by malformed association requests. Signed-off-by: Navaneeth K Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8723bs/core/rtw_mlme_ext.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c +++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c @@ -1036,6 +1036,9 @@ unsigned int OnAssocReq(struct adapter * status = WLAN_STATUS_CHALLENGE_FAIL; goto OnAssocReqFail; } else { + if (ie_len > sizeof(supportRate)) + ie_len = sizeof(supportRate); + memcpy(supportRate, p+2, ie_len); supportRateNum = ie_len; @@ -1043,7 +1046,7 @@ unsigned int OnAssocReq(struct adapter * pkt_len - WLAN_HDR_A3_LEN - ie_offset); if (p) { - if (supportRateNum <= sizeof(supportRate)) { + if (supportRateNum + ie_len <= sizeof(supportRate)) { memcpy(supportRate+supportRateNum, p+2, ie_len); supportRateNum += ie_len; }