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 93AA94EE851 for ; Wed, 16 Sep 2026 10:33:28 +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=1789554823; cv=none; b=Jdc7NXd1iMQGq9AjWt9xMzK+xaHhBI2Y70jewV+kLG0efX6oJ6vk0hemHpsROr56f3xi/6NXyOpyVqNhrswucVrZFg7qc1aXMdFnRQKZDpWjWCGL+/DdB7Br7JZ77Ye89xOpddylyxOp0/XaERRikN2bX/pnn3is+gW18k9ZKGo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789554823; c=relaxed/simple; bh=OiOgm+xwwYsyu5lpUW9LNMV4thr5libd4GnOH1on+vM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ks9PgvNYMLrpWRZ7u3KIkw6YDQE20Ocfr9HMXHPOfBo/rVAkSjw2G88ijZFWNlH6/coBpEOrlNhKYCrr+xy0GXRdVvjwJY7/CdG1Eq7oMN+iKDph19c/ylXc5j5T0DVFT1DHjWQRhJWOtJjijwvgP2juFxFr60DZuA+GZ5mY4cM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CgAy1+qu; 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="CgAy1+qu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B0561F0089E; Wed, 16 Sep 2026 10:33:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789554804; bh=iQ2n/SuQAcsspBi+M1O1NWWVPLU1FALZDhDbuiqaJo0=; h=From:To:Cc:Subject:Date:Reply-To; b=CgAy1+qunwzSVRHAIY7BSdYJ8R8sjPDBxrVALk6ZwIRZ3WLdpM6e82qMgssD76kTW YZ4GF7zaFNTjm2eHa1N/yPRbWaOQHrGLEImt8EvpICfpQG3++8sVOPCRd/HiPfzH4i /mkNs98wzF+PNJnanA/Qtmwz16U26y17JS0FU/Zk= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-89811: drm/amdkfd: Add TLB flush after MES queue eviction/suspension Date: Wed, 16 Sep 2026 11:29:01 +0100 Message-ID: <2026091656-CVE-2026-89811-efbb@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=2716; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=BMsABfoI4gCr8cMGZpMpNWUU8B0XTF9vIEHPZBaeLlQ=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmr8jN629NVPJ5p2H/X4rXhFC8zqD0UPvX8f/942+PNH MdYaqU7YlkYBJkYZMUUWb5s4zm6v+KQopeh7WmYOaxMIEMYuDgFYCIq7xjmu7nsOhJr5Zn5etOW 3gvzJ7R/kF9fzDA/8k94oP8sv1V8unFb5edN8u00SfIHAA== 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/amdkfd: Add TLB flush after MES queue eviction/suspension MES (Micro Engine Scheduler) does not perform heavy-weight TLB invalidation after unmapping queues, unlike HWS which does this automatically. This causes a race condition where in-flight DMA descriptors can access memory that has been unmapped, leading to page faults and GPU queue hangs during SVM page migration. The issue manifests as KFDSVMRangeTest.MultiThreadMigrationTest failures on gfx1151 (Strix Point) with XNACK mode 1 enabled - the GPU compute queue hangs with packets submitted but never consumed. Add kfd_flush_tlb() calls after MES queue removal in two locations: - evict_process_queues_cpsch(): after all queues removed during eviction - suspend_queues(): after debug/criu queue suspension (with mem_fence barrier) This ensures all in-flight memory accesses from unmapped queues are flushed before memory is freed or migrated. (cherry picked from commit f5c4f88e0f9c45a8fb9dfac0c1df726c95e41b77) The Linux kernel CVE team has assigned CVE-2026-89811 to this issue. Affected and fixed versions =========================== Fixed in 6.18.51 with commit e230c546ed93741833ab5babb0b202f9c2052b45 Fixed in 7.2.5 with commit 6aae545c87087e4dc96e205452243813bfa73ba2 Fixed in 7.3-rc2 with commit 94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4 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-2026-89811 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/amdkfd/kfd_device_queue_manager.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/e230c546ed93741833ab5babb0b202f9c2052b45 https://git.kernel.org/stable/c/6aae545c87087e4dc96e205452243813bfa73ba2 https://git.kernel.org/stable/c/94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4