{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"important"},"category":"csaf_security_advisory","csaf_version":"2.0","distribution":{"text":"Copyright 2023 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"Security update for xen","title":"Title of the patch"},{"category":"description","text":"This update for xen fixes the following issues:\n\nSecurity fixes:\n\n- CVE-2022-42336: Fix an issue where guests configuring AMD\n  Speculative Store Bypass Disable would have no effect (XSA-431)\n  (bsc#1211433).\n- CVE-2022-42335: Fixed an issue where guests running under shadow\n  mode with a PCI devices passed through could force the hypervisor\n  to dereference arbitrary memory, leading to a denial of service\n  (XSA-430) (bsc#1210315).\n\nNon-security fixes:\n\n- Fixed a build warning false positive (bsc#1210570).\n- Added missing debug-info to xen-syms (bsc#1209237).\n- Updated to version 4.17.1 (bsc#1027519).\n- Fixed a failure during VM destruction when using host-assisted kexec\n  and kdump (bsc#1209245).\n- Other upstream fixes (bsc#1027519).\n","title":"Description of the patch"},{"category":"details","text":"SUSE-2023-2535,SUSE-SLE-Module-Basesystem-15-SP5-2023-2535,SUSE-SLE-Module-Server-Applications-15-SP5-2023-2535,openSUSE-SLE-15.5-2023-2535","title":"Patchnames"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"self","summary":"URL for SUSE-SU-2023:2535-1","url":"https://www.suse.com/support/update/announcement/2023/suse-su-20232535-1/"},{"category":"external","summary":"SUSE ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"self","summary":"URL of this CSAF 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so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.","title":"Vulnerability description"}],"product_status":{"fixed":["SUSE Linux Enterprise Module for Basesystem 15 SP5:xen-libs-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Basesystem 15 SP5:xen-tools-domU-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-devel-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-tools-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-tools-xendomains-wait-disk-4.17.1_04-150500.3.3.1.noarch","openSUSE Leap 15.5:xen-4.17.1_04-150500.3.3.1.aarch64","openSUSE Leap 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is shared between threads. Logic was introduced to keep track of how many threads require SSBD active in order to coordinate it, such logic relies on using a per-core counter of threads that have SSBD active. When running on the mentioned hardware, it's possible for a guest to under or overflow the thread counter, because each write to VIRT_SPEC_CTRL.SSBD by the guest gets propagated to the helper that does the per-core active accounting. Underflowing the counter causes the value to get saturated, and thus attempts for guests running on the same core to set SSBD won't have effect because the hypervisor assumes it's already active.","title":"Vulnerability description"}],"product_status":{"fixed":["SUSE Linux Enterprise Module for Basesystem 15 SP5:xen-libs-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Basesystem 15 SP5:xen-tools-domU-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-devel-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-tools-4.17.1_04-150500.3.3.1.x86_64","SUSE Linux Enterprise Module for Server Applications 15 SP5:xen-tools-xendomains-wait-disk-4.17.1_04-150500.3.3.1.noarch","openSUSE Leap 15.5:xen-4.17.1_04-150500.3.3.1.aarch64","openSUSE Leap 15.5:xen-4.17.1_04-150500.3.3.1.x86_64","openSUSE Leap 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