USN-8619-1: Linux kernel (HWE) vulnerabilities

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. CVE-2025-54505 It was discovered that some AMD Zen 2 processors did not properly isolate shared...

Fedora 42 : xen (2026-e39149a8a0)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-e39149a8a0 advisory. x86: buffer overrun with shadow paging + tracing XSA-477, CVE-2025-58150 x86: incomplete IBPB for vCPU isolation XSA-479, CVE-2026-23553 Tenable has...

SUSE SLES12: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2026:0328-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0328-1 advisory. Security fixes: - CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing XSA-477 bsc1256745 - CVE-2026-23553: Fixed incomplete IBP...

Security update for xen

This update for xen fixes the following issues: CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing XSA-477 bsc1256745 CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation XSA-479 bsc1256747 Special Instructions and Notes: Please reboot the system after installing this update...

Enter, Exit, Page Fault, Leak: Testing Isolation Boundaries for Microarchitectural Leaks

CPUs provide isolation mechanisms like virtualization and privilege levels to protect software. Yet these focus on architectural isolation while typically overlooking microarchitectural side channels, exemplified by Meltdown and Foreshadow. Software must therefore supplement architectural defense...

OESA-2023-1554 microcode_ctl security update

This is a tool to transform and deploy microcode update for x86 CPUs. Security Fixes: Incorrect default permissions in some memory controller configurations for some IntelR XeonR Processors when using IntelR Software Guard Extensions which may allow a privileged user to potentially enable...

UBUNTU-CVE-2022-21233

Improper isolation of shared resources in some IntelR Processors may allow a privileged user to potentially enable information disclosure via local access...

DEBIAN-CVE-2020-24511

Improper isolation of shared resources in some IntelR Processors may allow an authenticated user to potentially enable information disclosure via local access...