CVE-2022-4144

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	23.04 lunar	Not affected
	22.10 kinetic	Fixed 1:7.0+dfsg-7ubuntu2.6
	22.04 LTS jammy	Fixed 1:6.2+dfsg-2ubuntu6.11
	20.04 LTS focal	Fixed 1:4.2-3ubuntu6.27
	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.42+esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.51+esm2 Ubuntu Pro
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.47+esm3 Ubuntu Pro

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
qemu	Upstream: 61c34fc Upstream: b1901de Upstream: 8efec0e Upstream: 6dbbf05 Upstream: 86fdb05

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
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

References

Related Ubuntu Security Notices (USN)

USN-6167-1
QEMU vulnerabilities
19 June 2023