6.5 MEDIUM
- CVSS version: 3.1
- Attack vector (AV): LOCAL
- Attack complexity (AC): LOW
- Privileges required (PR): LOW
- User interaction (UI): NONE
- Scope (S): CHANGED
- Confidentiality impact (C): NONE
- Integrity impact (I): NONE
- Availability impact (A): HIGH
Qemu-kvm: heap off-by-one in kvm xen physdevop_map_pirq
An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption.
References
- https://access.redhat.com/security/cve/CVE-2026-0665 x_refsource_REDHAT vdb-entry
- RHBZ#2428640 issue-tracking x_refsource_REDHAT
Affected products
- =<10.2.0
Matching in nixpkgs
pkgs.qemu
Generic and open source machine emulator and virtualizer
pkgs.qemu_kvm
Generic and open source machine emulator and virtualizer
pkgs.qemu_xen
Generic and open source machine emulator and virtualizer
pkgs.qemu-user
QEMU User space emulator - launch executables compiled for one CPU on another CPU
pkgs.qemu_full
Generic and open source machine emulator and virtualizer
pkgs.qemu_test
Generic and open source machine emulator and virtualizer
pkgs.qemu-utils
Generic and open source machine emulator and virtualizer
pkgs.canokey-qemu
CanoKey QEMU Virt Card
pkgs.ubootQemuX86
Boot loader for embedded systems
-
nixos-unstable x86_defconfig-2025.10
- nixpkgs-unstable x86_defconfig-2025.10
- nixos-unstable-small x86_defconfig-2025.10
-
nixos-25.11 x86_defconfig-2025.10
- nixos-25.11-small x86_defconfig-2025.10
- nixpkgs-25.11-darwin x86_defconfig-2025.10
pkgs.ubootQemuX86_64
Boot loader for embedded systems
-
nixos-unstable x86_64_defconfig-2025.10
- nixpkgs-unstable x86_64_defconfig-2025.10
- nixos-unstable-small x86_64_defconfig-2025.10
-
nixos-25.11 x86_64_defconfig-2025.10
- nixos-25.11-small x86_64_defconfig-2025.10
- nixpkgs-25.11-darwin x86_64_defconfig-2025.10
pkgs.ubootQemuAarch64
Boot loader for embedded systems
-
nixos-unstable qemu_arm64_defconfig-2025.10
- nixpkgs-unstable qemu_arm64_defconfig-2025.10
- nixos-unstable-small qemu_arm64_defconfig-2025.10
-
nixos-25.11 qemu_arm64_defconfig-2025.10
- nixos-25.11-small qemu_arm64_defconfig-2025.10
- nixpkgs-25.11-darwin qemu_arm64_defconfig-2025.10
pkgs.qemu-python-utils
Python tooling used by the QEMU project to build, configure, and test QEMU
pkgs.armTrustedFirmwareQemu
Reference implementation of secure world software for ARMv8-A
pkgs.python312Packages.qemu
Python tooling used by the QEMU project to build, configure, and test QEMU
pkgs.python313Packages.qemu
Python tooling used by the QEMU project to build, configure, and test QEMU
pkgs.python314Packages.qemu
Python tooling used by the QEMU project to build, configure, and test QEMU
pkgs.python312Packages.qemu-qmp
Asyncio library for communicating with QEMU Monitor Protocol (“QMP”) servers
pkgs.python313Packages.qemu-qmp
Asyncio library for communicating with QEMU Monitor Protocol (“QMP”) servers
pkgs.python314Packages.qemu-qmp
Asyncio library for communicating with QEMU Monitor Protocol (“QMP”) servers
Package maintainers
-
@lopsided98 Ben Wolsieffer <benwolsieffer@gmail.com>
-
@oxalica oxalica <oxalicc@pm.me>
-
@devplayer0 Jack O'Sullivan <dev@nul.ie>
-
@DavHau David Hauer <d.hauer.it@gmail.com>
-
@alyssais Alyssa Ross <hi@alyssa.is>
-
@SigmaSquadron Fernando Rodrigues <alpha@sigmasquadron.net>
-
@CertainLach Yaroslav Bolyukin <iam@lach.pw>
-
@hehongbo Hongbo
-
@bartsch Daniel Martin <consume.noise@gmail.com>
-
@dezgeg Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
-
@brianmcgillion Brian McGillion <bmg.avoin@gmail.com>