SUSE-SU-2026:3423-1 Security update for xen

This update for xen fixes the following issues - CVE-2026-42493: x86 shadow paging is deprecated bsc1271528. - CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling bsc1271530. - CVE-2026-62426,CVE-2026-62427: sysctl and...

CVE-2026-62427

CVE-2026-62427 affects Xen environments where sysctl and platform-op locks are used in the control domain or Xenstore domain. The issue arises from non-fair system-wide locks and, with XSM/Flask, lock acquisition occurring before permission checks, enabling abuse that can lead to a Denial of Serv...