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CVE-2021-3638

Published: 3 March 2022

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

Notes

AuthorNote
mdeslaur
introduced in qemu 4.0
as of 2022-09-12, the proposed patch has not been committed
into the upstream tree

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
groovy Ignored
(end of life)
trusty Not vulnerable
(code not present)
upstream Needs triage

xenial Not vulnerable
(code not present)
focal Deferred

hirsute Ignored
(end of life)
impish Ignored
(end of life)
kinetic Ignored
(end of life, was deferred)
jammy Deferred

lunar Deferred

mantic Deferred

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