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 443CD3E274A for ; Fri, 8 May 2026 13:14:34 +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=1778246074; cv=none; b=s1FkklNRg4gCDfbE/ZOw+LuR9ncO3HXYj4VFYyD+pV+q3XjHX4T4WCcEZvoNkPE0oWZP0n1U3MFiPx/hJH0bcTSMWQsESCTP3KYNIqgNC1LyxClSwDwK5w8t80stwO45PnUSAWFDvdkrEYFT/OgzcOQj+ONS//ajMg6y8kqbHUw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778246074; c=relaxed/simple; bh=eMZo01ifi4WSLIHzAS94WTIifisCsjDvmfYc+4JpyDg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=F342qlCC2NHdEdEh/uI0OsdalQgatOfgSCN669cHAMbVbGIhID+rQUtjYyDhTqEfcUXer22JAP8iuBuDmdyyteJPmjQUfNXB0N7bnVhq1+1m6StS8F49s7GG++MAlzyLSGzmPEqjMefK9rIeyJsdzA7oKOf23gKds9qisY2JqmM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PFl/lP/f; 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="PFl/lP/f" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CEFF6C2BCB0; Fri, 8 May 2026 13:14:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778246074; bh=eMZo01ifi4WSLIHzAS94WTIifisCsjDvmfYc+4JpyDg=; h=From:To:Cc:Subject:Date:Reply-To:From; b=PFl/lP/f10K7QOJVsJSsNo0YnXZezg4F4tXk/QZ3KHzCD5CeS5MDNgDErU9yy8/b3 4tZ0BJMVjVXJGSmiPIOvelTPQhyau4JGJ+1AqH0vJ2JpEFvuRbKyDw88lK64wL3379 0wJ+f82WIB2VYt+4krUCOr6r0iohJayru4TPJXPg= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43305: drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path Date: Fri, 8 May 2026 15:12:10 +0200 Message-ID: <2026050858-CVE-2026-43305-b13c@gregkh> X-Mailer: git-send-email 2.54.0 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=1971; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=vwOEP7uOFNowL0LRXiE4g0hr5D3VnRfc142vI0qwK54=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/H8p5vap9k78t96rXpFrjwANGaiuOH8g05NsZty5l3 5/pkzkEOmJZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAiGwUZFlyz/cATJvl23tOG 1o+dWxavvZ/xfgrDPOvffmwc65+LKv0XSROrM+WebaCcDQA= 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: drm/amd/display: Fix mismatched unlock for DMUB HW lock in HWSS fast path [Why] The evaluation for whether we need to use the DMUB HW lock isn't the same as whether we need to unlock which results in a hang when the fast path is used for ASIC without FAMS support. [How] Store a flag that indicates whether we should use the lock and use that same flag to specify whether unlocking is needed. The Linux kernel CVE team has assigned CVE-2026-43305 to this issue. Affected and fixed versions =========================== Fixed in 6.19.6 with commit 4e387ad67efb100b645630ffbce7716786f52283 Fixed in 7.0 with commit af3303970da5ce5bfe6dffdd07f38f42aad603e0 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-2026-43305 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/gpu/drm/amd/display/dc/core/dc_hw_sequencer.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/4e387ad67efb100b645630ffbce7716786f52283 https://git.kernel.org/stable/c/af3303970da5ce5bfe6dffdd07f38f42aad603e0