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 6AD943B102F for ; Thu, 28 May 2026 09:41:07 +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=1779961269; cv=none; b=uAi5rrs8sagu9sGuDGp1eSQEguFVgyPXqEM8t7qjZ0X+9ueuujruI5/ygVu8eEo5Hyw7ygKK299nxgnU78xhuCxpYQ0k/fKagVd2+NIrvaO9bBHeCW+4DDo1hSp/lncQZ5l6RksAG/B/AgPFFMdz1apAVsdzaG2hg6f+IhiX1Cc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779961269; c=relaxed/simple; bh=qo6r7u56c5fpoOMD3IP8Y3gS6sR822dQYeZ/s8WwK7U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=T6pMzYyNb1w/T1C438KRJXhJJ64X+f5BTBOVNrylm5YP0necLi72JJ3PsbEaNSCjC7q1hrW0K8CXNEm5nZZcY1BN43J084XeuVD3U7o/+ZyMTSrsE1aOyfiOlWVHGaqVlZRgmy0ch11nbSeV7VeRNbTNcTqz7ukZWZWcWu1XvOg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Qu1LMO/M; 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="Qu1LMO/M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2FAEB1F000E9; Thu, 28 May 2026 09:41:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779961266; bh=dI2Yuw+ZX9QY42gSNNbMQogQNVoDEqk7of4OWDB9dO4=; h=From:To:Cc:Subject:Date:Reply-To; b=Qu1LMO/MBZItyfpmHq3+qp0CtE08D1pd9WiEt/pjlZZoQCrZxhxPrAww1hoRAzsZb 8ZeAbWWEjTpIZiTErgGR0ztN9Fuewwvxw34zLiwylESVx9pxOlnKV1d1jMc3WrgqLJ 0Ho3DtyLTIvY+fazvOfINBBftGO8i6K3/BAJlbKE= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-46174: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache Date: Thu, 28 May 2026 11:37:19 +0200 Message-ID: <2026052828-CVE-2026-46174-e399@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=2690; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=y8AxJMBFnoxGkYtTEKiGm44HcWUBhhbfkMSb8iWuDLU=; b=owGbwMvMwCRo6H6F97bub03G02pJDFkSPHNYt+caLp/pGPh5o+IcjxVHlbZ8iefuO9MTK3FJb 9Ml/8P+HbEsDIJMDLJiiixftvEc3V9xSNHL0PY0zBxWJpAhDFycAjCRLe8Y5qfdtFlxdNYBy13e VS+Vr6jmvtteUMaw4HQsp3jZwr6Ns/7ldcfdTT0rqR2sCwA= 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: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache Make sure resources are not improperly shared in the op cache and cause instruction corruption this way. The Linux kernel CVE team has assigned CVE-2026-46174 to this issue. Affected and fixed versions =========================== Fixed in 5.10.256 with commit 1e23b30a80b14e5764657401ee2cca030525ae8e Fixed in 5.15.207 with commit f5bc3aef7df46eaaf423d7413ab8833f704ae576 Fixed in 6.1.173 with commit 251497955f2314cd39d43191e81c6151dead4c7b Fixed in 6.6.139 with commit ff6fc65b3bf73acc5ee71919154d830ad5431362 Fixed in 6.12.88 with commit 9109489cc8c34e50d15575a3d1ff82af586bc1aa Fixed in 6.18.30 with commit 28f5ed477eef166d678d6966762cbc1de9b4f436 Fixed in 7.0.7 with commit 1cd85a19748b2407830376a5cbae5c0f126016e5 Fixed in 7.1-rc4 with commit c21b90f77687075115d989e53a8ec5e2bb427ab1 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-2026-46174 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: arch/x86/include/asm/msr-index.h arch/x86/kernel/cpu/amd.c tools/arch/x86/include/asm/msr-index.h 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/1e23b30a80b14e5764657401ee2cca030525ae8e https://git.kernel.org/stable/c/f5bc3aef7df46eaaf423d7413ab8833f704ae576 https://git.kernel.org/stable/c/251497955f2314cd39d43191e81c6151dead4c7b https://git.kernel.org/stable/c/ff6fc65b3bf73acc5ee71919154d830ad5431362 https://git.kernel.org/stable/c/9109489cc8c34e50d15575a3d1ff82af586bc1aa https://git.kernel.org/stable/c/28f5ed477eef166d678d6966762cbc1de9b4f436 https://git.kernel.org/stable/c/1cd85a19748b2407830376a5cbae5c0f126016e5 https://git.kernel.org/stable/c/c21b90f77687075115d989e53a8ec5e2bb427ab1