CVE-2026-79602

A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen...

UBUNTU-CVE-2026-79603

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

Unconditionally do TLB flushing ahead of page scrubbing

ISSUE DESCRIPTION x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify ...

x86: DMs may cause mem leak by IRQ binding

ISSUE DESCRIPTION When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that...

x86: improper handling of HVM emulation return codes

ISSUE DESCRIPTION A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen. IMPACT Passing through a PCI device with at least one BAR in IO address space to unprivileged HVM guests can result in a Denial of Service DoS affecting the entire host...

Linux Distros Unpatched Vulnerability : CVE-2026-79604

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Debian Linux - xen - None Ubuntu Linux - oxenstored: Unbounded accumulation of watches: Oxenstored maintains two datastructures about watches; one global trie,...

PT-2026-87051

These are all security issues fixed in the xen-4.22.0 04-1.1 package on the GA media of openSUSE Tumbleweed...

CVE-2026-79602: Improper Restriction of Operations within the Bounds of a Memory Buffer

A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen...

Linux Distros Unpatched Vulnerability : CVE-2026-79603

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used...

CentOS 9 : kernel-5.14.0-742.el9

The remote CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the kernel-5.14.0-742.el9 build changelog. - In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: fix double free via VMA splitting privcmdvmops defines...

Linux Distros Unpatched Vulnerability : CVE-2026-79602

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A guest with a PCI device assigned that has at least a BAR on the IO port space can trigger a BUG in Xen. CVE-2026-79602 Note that Nessus relies on the presence...

PT-2026-87052

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-053433)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-053433 advisory. In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvifflushhash During the listforeachentryrcu iteration call of...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-099003)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-099003 advisory. In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: restrict usage in unprivileged domU The Xen privcmd driver allows to issue arbitrary...

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

The vulnerability of the privcmdinit function in the drivers/xen/privcmd.c module of the Linux kernel is related to deficiencies in access control. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of protected information...

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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 ...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabilit...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerability has been resolved: soc: qcom: cmd-db: Maps shared memory as WC, not WB. Linux does not write to the cmd-db region. This memory region is protected from writing by XPU. XPU may sometimes falsely detect a clean cache eviction as a “write” to the...

Astra Linux – Vulnerability in Xen

A issue was discovered in Xen through version 4.11.x, allowing users of x86 Intel HVM guest operating systems to obtain unintended read/write DMA access. This could potentially lead to a denial of service causing the host operating system to crash or result in privilege escalation. This issue...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: Accommodation for VMA splitting Prior to this commit, the gntdev driver code did not handle the following scenario correctly with paravirtualized PV Xen domains: The user process sets up a gntdev mapping consisting of...