{"id":"SUSE-SU-2026:4090-1","summary":"Security update for xen","details":"This update for xen fixes the following issues:\n\nUpdate to version 4.20.3 (jsc#PED-8907).\n\nSecurity issues fixed:\n\n- CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).\n- CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660\n  handling (bsc#1271530).\n- CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).\n- CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).\n- CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).\n- CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).\n- CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).\n- CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).\n- CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).\n- CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).\n- CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).\n- CVE-2026-79602: x86: improper handling of HVM emulation return codes (bsc#1276839).\n- CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing (bsc#1276841).\n- pygrub is only supported in de-privileged mode (bsc#1271947).\n\nNon security issue fixed:\n\n- Xen: Missing upstream bug fixes (bsc#1027519).\n","modified":"2026-09-13T18:23:20.566887008Z","published":"2026-09-08T12:26:56Z","related":["CVE-2026-42493","CVE-2026-42494","CVE-2026-42495","CVE-2026-62423","CVE-2026-62424","CVE-2026-62425","CVE-2026-62426","CVE-2026-62427","CVE-2026-62428","CVE-2026-62429","CVE-2026-62430","CVE-2026-62431","CVE-2026-62432","CVE-2026-62433","CVE-2026-62434","CVE-2026-62437","CVE-2026-79602","CVE-2026-79603"],"upstream":["CVE-2026-42493","CVE-2026-42494","CVE-2026-42495","CVE-2026-62423","CVE-2026-62424","CVE-2026-62425","CVE-2026-62426","CVE-2026-62427","CVE-2026-62428","CVE-2026-62429","CVE-2026-62430","CVE-2026-62431","CVE-2026-62432","CVE-2026-62433","CVE-2026-62434","CVE-2026-62437","CVE-2026-79602","CVE-2026-79603"],"references":[{"type":"ADVISORY","url":"https://www.suse.com/support/update/announcement/2026/suse-su-20264090-1/"},{"type":"REPORT","url":"https://bugzilla.suse.com/1027519"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271528"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271530"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271531"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271532"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271533"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271534"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271535"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271536"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271537"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271538"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271539"},{"type":"REPORT","url":"https://bugzilla.suse.com/1271947"},{"type":"REPORT","url":"https://bugzilla.suse.com/1276838"},{"type":"REPORT","url":"https://bugzilla.suse.com/1276839"},{"type":"REPORT","url":"https://bugzilla.suse.com/1276841"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-42493"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-42494"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-42495"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62423"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62424"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62425"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62426"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62427"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62428"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62429"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62430"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62431"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62432"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62433"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62434"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-62437"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-79602"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-79603"}],"affected":[{"package":{"name":"xen","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP7","purl":"pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4_04-150700.3.46.1"}]}],"ecosystem_specific":{"binaries":[{"xen-libs":"4.20.4_04-150700.3.46.1","xen-tools-domU":"4.20.4_04-150700.3.46.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4090-1.json"}},{"package":{"name":"xen","ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP7","purl":"pkg:rpm/suse/xen&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4_04-150700.3.46.1"}]}],"ecosystem_specific":{"binaries":[{"xen-devel":"4.20.4_04-150700.3.46.1","xen-tools":"4.20.4_04-150700.3.46.1","xen-tools-xendomains-wait-disk":"4.20.4_04-150700.3.46.1","xen":"4.20.4_04-150700.3.46.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4090-1.json"}}],"schema_version":"1.9.0"}