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 0AE4014A4CC for ; Fri, 4 Sep 2026 16:52:35 +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=1788540756; cv=none; b=lCRta8Icx9f0R//po2VzKxV0pVS6FltNCEtGLnlPsNAUEY+OxMr36O4hqFWHiNqPoyXNOjR71XWcOmBdvCf0njSE7T+l7l4sUG5r9s5l9chS4VCSO6zEHcEwOMfy6lvZduJZuMa4lA6MaBmjjgqxUXPbD3vKE47Oce/HH2c0Kqo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788540756; c=relaxed/simple; bh=fIYejYZI+B6tm2SYo2iaAmNl2jsytjn4gMA0iaRL2pQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LCmfEH0jEMNSawENdIPXjiLXzAaZpL2B5BADX4kwNblkNWseSfSXibUGPyIZrLiCgc/ZWutPvds96413YLpa3mPCHJIzTC/mkRwBOgbxLVvxH0eeoRYz9EO/Nrqy9xNW5A+g2KzpY8TjSwhG3ekME/p09OMdXg+kHjWnmxHUZ0U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TZsfD5cX; 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="TZsfD5cX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 376851F00A3D; Fri, 4 Sep 2026 16:52:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788540754; bh=8V1JcSPI1N2ENMgvPnBm+U6rMx/AvZghBKwolu3R5S8=; h=From:To:Cc:Subject:Date:Reply-To; b=TZsfD5cXvmUHzYrA5+ZvbMH1mnmKGZKEKy3kp/YW2M2zXpBcfqoSomYUXTFCjsP2j fnV3jTnGwALSkAl1TJYx2GlOFBoEFtF44RHVo/s2aagf6zyPYgpkyn9WIkjewc5w3F zTAmOMu2P4i8ksauwGpVZMw9Ap5dYQpW85QjoVgA= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-80873: KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions Date: Fri, 4 Sep 2026 18:46:40 +0200 Message-ID: <2026090435-CVE-2026-80873-513f@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=2439; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=a2qZ9auHwapooMefRL67LNRA/v59hC2Yliz/kYUhc3I=; b=owGbwMvMwCRo6H6F97bub03G02pJDFmzvr4uNeluPxKwsss26M70ffqhueW1V7iPzxZiMIhZf u/rz4srO2JZGASZGGTFFFm+bOM5ur/ikKKXoe1pmDmsTCBDGLg4BWAiMzQZ5seutjns5szQWvrD 1O7P3t1Z6WkRMxkWtMxYozWld7J42fZHh9YpqlbHujjwAgA= 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: KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions kvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions but not for SError. enter_exception64() does not write ESR_ELx for any exception type, so the constructed syndrome is dropped. A guest L2 hypervisor taking a nested SError observes stale ESR_EL2. This affects both kvm_inject_nested_serror() and the EASE path in kvm_inject_nested_sea(). Write ESR_EL2 for except_type_serror, matching except_type_sync. The Linux kernel CVE team has assigned CVE-2026-80873 to this issue. Affected and fixed versions =========================== Issue introduced in 6.17 with commit 77ee70a073575977b403e9add25f185d614217d8 and fixed in 6.18.40 with commit 09f35145f3a4aacea4d9b914ad895bf5af8fc4ae Issue introduced in 6.17 with commit 77ee70a073575977b403e9add25f185d614217d8 and fixed in 7.1.5 with commit 29227821e2320ff6a174c91742b4ce221fe8d563 Issue introduced in 6.17 with commit 77ee70a073575977b403e9add25f185d614217d8 and fixed in 7.2 with commit e2cb1f4578625e71f461d5c1ce70984193389cbb 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-2026-80873 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/arm64/kvm/emulate-nested.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/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563 https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb