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 8A93C32BBF5 for ; Wed, 17 Sep 2025 14:58:42 +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=1758121122; cv=none; b=bHQdbshWtS5htPM0pve1HlOS/PiSOyb0pBpBkizvNEJfo+v0TmxxcwbAQWiQjxkBqeagJi/OpGu9OXneaEl3xTBZh8NbCjDP1Bxx+f5pcunWT4qrl393JscMQYC9IQs2mZdenyb5+9iGmQx9nnYig3mS9ccA6jtuSc71i5r4/1M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758121122; c=relaxed/simple; bh=ATTSlTpbkUButv6+FTXwgX4nDo3EzQ+gNILpVfipcVQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=phHrnxV4TJC3j/mDhSBCr+NCnEPquL1VWSOldjgEz9FOmR3UmHxAgcSPWg+vCuKeAOYE1JchUnmOT+iTvlzpRpOZWZwQivI7aBMS8hEgRL24ipSFlCDUAbbAnV+6j/zluZHNgxvYBbS8URmc4AQlLx/rxqJFYsSHO9ZCjYu2SUA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rbj7OK6H; 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="rbj7OK6H" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EFDBAC4CEE7; Wed, 17 Sep 2025 14:58:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1758121122; bh=ATTSlTpbkUButv6+FTXwgX4nDo3EzQ+gNILpVfipcVQ=; h=From:To:Cc:Subject:Date:Reply-to:From; b=rbj7OK6HDukzgYzOMmzFuNTfbvaIJcLoYB51/+FGqsI3+kHJb6OLsOjnt21uGYsHS cx/sQeVqi/8ldVu+FlY11aP6Y4U1nR/LZEgpgJHHayDEjJ5wXIHMycTKJChhJbSq/p wik/EdsK8no1sz+54VsCgAMbE0iduAjMHTVeUxsk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-50359: media: cx88: Fix a null-ptr-deref bug in buffer_prepare() Date: Wed, 17 Sep 2025 16:56:18 +0200 Message-ID: <2025091714-CVE-2022-50359-e9fb@gregkh> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=3638; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=qM6OtslTU7527I6QnxOBQ7WWUlSU5lfnElMTC6aO7+c=; b=owGbwMvMwCRo6H6F97bub03G02pJDBmnzvBfmN/71e0Nz0HvuvK5RcWJ004Z/f3Hu8Fl4fQ68 RUlU0t5O2JZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAi2fkMC7akq6V+5WLNf2Bg dp2V2eTp143GVxgWbHc4fN6qfSKjfXGG2Q7hE8fPuc/jBgA= 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: media: cx88: Fix a null-ptr-deref bug in buffer_prepare() When the driver calls cx88_risc_buffer() to prepare the buffer, the function call may fail, resulting in a empty buffer and null-ptr-deref later in buffer_queue(). The following log can reveal it: [ 41.822762] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI [ 41.824488] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 41.828027] RIP: 0010:buffer_queue+0xc2/0x500 [ 41.836311] Call Trace: [ 41.836945] __enqueue_in_driver+0x141/0x360 [ 41.837262] vb2_start_streaming+0x62/0x4a0 [ 41.838216] vb2_core_streamon+0x1da/0x2c0 [ 41.838516] __vb2_init_fileio+0x981/0xbc0 [ 41.839141] __vb2_perform_fileio+0xbf9/0x1120 [ 41.840072] vb2_fop_read+0x20e/0x400 [ 41.840346] v4l2_read+0x215/0x290 [ 41.840603] vfs_read+0x162/0x4c0 Fix this by checking the return value of cx88_risc_buffer() [hverkuil: fix coding style issues] The Linux kernel CVE team has assigned CVE-2022-50359 to this issue. Affected and fixed versions =========================== Fixed in 4.9.331 with commit c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1 Fixed in 4.14.296 with commit 10c99d1c46ea9cd940029e17bab11d021f315c21 Fixed in 4.19.262 with commit 4befc7ffa18ef9a4b70d854465313a345a06862f Fixed in 5.4.220 with commit 9181af2dbf06e7f432e5dbe88d10b22343e851b9 Fixed in 5.10.150 with commit c2257c8a501537afab276c306cb717b7260276e1 Fixed in 5.15.75 with commit 6f21976095c1e92454ab030976f95f40d652351b Fixed in 5.19.17 with commit 704838040f3bdb4aa07ff4f26505a666a3defcfe Fixed in 6.0.3 with commit 644d5a87ab1863eb606526ea743021752a17e9cb Fixed in 6.1 with commit 2b064d91440b33fba5b452f2d1b31f13ae911d71 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-2022-50359 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/media/pci/cx88/cx88-vbi.c drivers/media/pci/cx88/cx88-video.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/c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1 https://git.kernel.org/stable/c/10c99d1c46ea9cd940029e17bab11d021f315c21 https://git.kernel.org/stable/c/4befc7ffa18ef9a4b70d854465313a345a06862f https://git.kernel.org/stable/c/9181af2dbf06e7f432e5dbe88d10b22343e851b9 https://git.kernel.org/stable/c/c2257c8a501537afab276c306cb717b7260276e1 https://git.kernel.org/stable/c/6f21976095c1e92454ab030976f95f40d652351b https://git.kernel.org/stable/c/704838040f3bdb4aa07ff4f26505a666a3defcfe https://git.kernel.org/stable/c/644d5a87ab1863eb606526ea743021752a17e9cb https://git.kernel.org/stable/c/2b064d91440b33fba5b452f2d1b31f13ae911d71