kernel: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation

A flaw was found in AMD Zen 2-based processors, affecting components such as the kernel and Xen hypervisor. Improper isolation of shared resources within the CPU operation cache could allow an attacker to corrupt instructions executed at a different privilege level. This could potentially result ...

kernel: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation

A flaw was found in AMD Zen 2-based processors, affecting components such as the kernel and Xen hypervisor. Improper isolation of shared resources within the CPU operation cache could allow an attacker to corrupt instructions executed at a different privilege level. This could potentially result ...

kernel: xen/privcmd: fix double free via VMA splitting

A flaw was found in the Linux kernel's xen/privcmd module. A local user could exploit this by performing a partial unmapping of a privcmd memory region. This action causes a Virtual Memory Area VMA to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed...

SUSE CVE-2026-62430

Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usages of the index didn't take the necessary locking to avoid concurrent changes. As a result, a guest could change the index after it being checked,...

SUSE CVE-2026-62434

A guest started with Populated on Demand enabled PoD can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen...

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 platform-op...

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 platform-op...

Linux Distros Unpatched Vulnerability : CVE-2026-62434

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A guest started with Populated on Demand enabled PoD can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management...

Linux Distros Unpatched Vulnerability : CVE-2026-62430

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usages of the...

kernel: xen/privcmd: fix double free via VMA splitting

A flaw was found in the Linux kernel's xen/privcmd module. A local user could exploit this by performing a partial unmapping of a privcmd memory region. This action causes a Virtual Memory Area VMA to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed...

CVE-2026-62426

A flaw was found in Xen. The system's sysctl operations utilize a global lock that lacks fairness in its acquisition mechanism. Additionally, when Xen Security Modules XSM with Flask are active, this lock can be acquired before proper permission checks are performed. This vulnerability could allo...

CVE-2026-62434

A flaw was found in Xen. When a guest operating system is started with Populated on Demand PoD enabled, it can attempt to reclaim memory pages that are not regular guest RAM. This action can lead to the corruption of Xen's memory management state, potentially causing system instability or denial ...

CVE-2026-62429

A flaw was found in Xen. A race condition exists where a guest's virtual Non-Uniform Memory Access vNUMA configuration data can be accessed by a device model even after the guest's domain destruction has started. This occurs because the cleanup of the vNUMA configuration is not synchronized with...

CVE-2026-62432

A flaw was found in Xen. A timing issue, known as a race condition, exists in the event channel handling mechanism. This occurs when the system attempts to expand event channels without properly securing access, allowing another operation to interfere. This can lead to the system attempting to...

CVE-2026-62431

A flaw was found in Xen. The logic responsible for handling periodic Viridian STIMERs performs a division operation using a value that can be controlled by a user. If a malicious user sets this divisor value to zero, it can lead to a division-by-zero error, resulting in a DE fault and causing a...

CVE-2026-62433

A flaw was found in Xen. The DMOP handling code in Xen does not properly validate the number of buffers provided by the caller. This oversight can lead to the system accessing uninitialized memory, potentially resulting in information disclosure or other unpredictable behavior. A malicious guest...

CVE-2026-62430

A flaw was found in Xen. This vulnerability allows a guest operating system to read data beyond its intended memory boundaries, potentially leading to information disclosure. The issue arises from improper synchronization during access to the CMOS Complementary Metal-Oxide-Semiconductor memory. A...

CVE-2026-62428

A flaw was found in Xen. When processing grant-copy operations, a type confusion vulnerability can occur if the grant is already in use by another operation. This can lead to permission checks being performed on an incorrect memory page, potentially allowing an attacker to bypass security...

CVE-2026-62434

A guest started with Populated on Demand enabled PoD can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen...

CVE-2026-62434 PoD: Don't try to reclaim special pages

A guest started with Populated on Demand enabled PoD can attempt to reclaim pages which aren't regular guest RAM. This can cause corruption of memory management state in Xen...