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CVE-2022-4144

Published: 29 November 2022

An out-of-bounds read flaw was found in the QXL display device emulation in QEMU. The qxl_phys2virt() function does not check the size of the structure pointed to by the guest physical address, potentially reading past the end of the bar space into adjacent pages. A malicious guest user could use this flaw to crash the QEMU process on the host causing a denial of service condition.

Priority

Low

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
jammy
Released (1:6.2+dfsg-2ubuntu6.11)
kinetic
Released (1:7.0+dfsg-7ubuntu2.6)
lunar Not vulnerable
(1:7.2+dfsg-5ubuntu2)
trusty
Released (2.0.0+dfsg-2ubuntu1.47+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

bionic
Released (1:2.11+dfsg-1ubuntu7.42+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal
Released (1:4.2-3ubuntu6.27)
xenial
Released (1:2.5+dfsg-5ubuntu10.51+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
Patches:
upstream: https://gitlab.com/qemu-project/qemu/-/commit/61c34fc1
upstream: https://gitlab.com/qemu-project/qemu/-/commit/b1901de8
upstream: https://gitlab.com/qemu-project/qemu/-/commit/8efec0ef
upstream: https://gitlab.com/qemu-project/qemu/-/commit/6dbbf055
upstream: https://gitlab.com/qemu-project/qemu/-/commit/86fdb058

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H