Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: 9p/xen: Protect xen9pfsfrontfree against concurrent calls The xenwatch thread can race with other backend change notifications and call xen9pfsfrontfree twice, causing the observed general protection fault due to a double-free...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: scsi: xen: scsiback: Fixed a potential memory leak in scsibackremove. The memory allocated for the struct vscsiblkinfo structure in scsibackprobe is not freed in scsibackRemove, resulting in potential memory leaks during the...

Astra Linux – Vulnerability found in Linux 6.12, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: xen-netback: Rejects configurations with a zero queue count from guests. A malicious or faulty Xen guest can set the value of the xenbus key “multi-queue-num-queues” to “0”. The connect function in the backend only validates the...

[SECURITY] [DSA 6424-1] xen security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6424-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff August 09, 2026 https://www.debian.org/security/faq -...

Debian dsa-6424 : libxen-dev - security update

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6424 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6424-1 [email protected] https://www.debian.org/securit...

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...

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...

RockyLinux 8 : kernel-rt (RLSA-2026:50979)

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:50979 advisory. kernel: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation CVE-2025-54518 Bug Fixes and Enhancements: Kernel crash in...

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...

The vulnerability of the buildid_show() function in the drivers/xen/privcmd.c file of the Linux kernel device driver module allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

The vulnerability of the buildidshow function in the drivers/xen/privcmd.c module of the Linux kernel device driver library is related to the re-release of previously released memory. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and...

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...