CVE-2022-50471 xen/gntdev: Accommodate VMA splitting

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: Accommodate VMA splitting Prior to this commit, the gntdev driver code did not handle the following scenario correctly with paravirtualized PV Xen domains: User process sets up a gntdev mapping composed of two grant...

CVE-2022-50471

CVE-2022-50471 affects the Linux kernel’s xen/gntdev mapping when using paravirtual Xen domains. The root cause was improper handling of VMAs during VMA splitting, where a gntdev mapping could involve multiple VMAs. This could lead to a Bad Page Table condition and kernel messages about a bad pte...

PT-2025-40658

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The gntdev driver in the Linux kernel did not correctly handle scenarios involving paravirtualized PV Xen domains and Virtual Memory Area VMA splitting. Specifically, the issue occurred...

UBUNTU-CVE-2022-50257

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: Prevent leaking grants Prior to this commit, if a grant mapping operation failed partially, some of the entries in the mapops array would be invalid, whereas all of the entries in the kmapops array would be valid. Thi...

CVE-2022-50257 xen/gntdev: Prevent leaking grants

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: Prevent leaking grants Prior to this commit, if a grant mapping operation failed partially, some of the entries in the mapops array would be invalid, whereas all of the entries in the kmapops array would be valid. Thi...

CVE-2022-50257: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: xen/gntdev: Prevent leaking grants Prior to this commit, if a grant mapping operation failed partially, some of the entries in the mapops array would be invalid, whereas all of the entries in the kmapops array would be valid. Thi...

Linux Distros Unpatched Vulnerability : CVE-2020-25596

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in Xen through 4.14.x. x86 PV guest kernels can experience denial of service via SYSENTER. The SYSENTER instruction leaves various state...

Linux Distros Unpatched Vulnerability : CVE-2019-19578

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to cause a denial of service via degenerate chains of linear pagetables, because of...

Linux Distros Unpatched Vulnerability : CVE-2022-33745

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF see XSA-273, PV guests may be run in...

Linux Distros Unpatched Vulnerability : CVE-2018-19965

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service host OS crash because GP0 can occur after a...

Linux Distros Unpatched Vulnerability : CVE-2021-28039

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0...

CVE-2025-41238

VMware ESXi, Workstation, and Fusion contain a heap-overflow vulnerability in the PVSCSI Paravirtualized SCSI controller that leads to an out of-bounds write. A malicious actor with local administrative privileges on a virtual machine may exploit this issue to execute code as the virtual machine'...

ALPINE-CVE-2024-45819

PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the tables in local memory, which are then copied into guest memory. While actually used parts of the local memory are filled in correctly, excess space that is being allocated is left with its prio...

Xen security vulnerabilities

Xen is an open source virtual machine monitor product from Xen Open Source. The product enables different and incompatible operating systems to run on the same computer and supports migration at runtime to ensure uptime and avoid downtime. A security vulnerability exists in Xen that stems from th...

DEBIAN-CVE-2023-46836

The fixes for XSA-422 Branch Type Confusion and XSA-434 Speculative Return Stack Overflow are not IRQ-safe. It was believed that the mitigations always operated in contexts with IRQs disabled. However, the original XSA-254 fix for Meltdown XPTI deliberately left interrupts enabled on two entry...

ALPINE-CVE-2023-34328

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of...

ALPINE-CVE-2023-34322

For migration as well as to work around kernels unaware of L1TF see XSA-273, PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on th...

SUSE CVE-2023-46836

The fixes for XSA-422 Branch Type Confusion and XSA-434 Speculative Return Stack Overflow are not IRQ-safe. It was believed that the mitigations always operated in contexts with IRQs disabled. However, the original XSA-254 fix for Meltdown XPTI deliberately left interrupts enabled on two entry...

SUSE CVE-2023-34328

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. AMD CPUs since 2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of...

Possible deadlock in Linux kernel event handling

ISSUE DESCRIPTION Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is being performed in parallel to an unrelated Xen console action and the handling of a Xen console interrupt in an unprivileged guest. The closing of an event channel is e.g...