CVE-2021-3546

Published: 2 June 2021

An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process.

Notes

Author	Note
mdeslaur	same commits as CVE-2021-3544

Priority

Cvss 3 Severity Score

8.2

Score breakdown

Status

Package	Release	Status
qemu Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code not present)
	focal	Released (1:4.2-3ubuntu6.17)
	groovy	Released (1:5.0-5ubuntu9.9)
	hirsute	Released (1:5.2+dfsg-9ubuntu3.1)
	impish	Released (1:6.0+dfsg-2expubuntu1.2)
	jammy	Released (1:6.2+dfsg-2ubuntu5)
	trusty	Not vulnerable (code not present)
	upstream	Needs triage
	xenial	Not vulnerable (code not present)
	Patches: upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=121841b25d72d13f8cad554363138c360f1250ea upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=86dd8fac2acc366930a5dc08d3fb1b1e816f4e1e upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=b9f79858a614d95f5de875d0ca31096eaab72c3b upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=b7afebcf9e6ecf3cf9b5a9b9b731ed04bca6aa3e upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=f6091d86ba9ea05f4e111b9b42ee0005c37a6779 upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=63736af5a6571d9def93769431e0d7e38c6677bf upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=9f22893adcb02580aee5968f32baa2cd109b3ec2 upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=3ea32d1355d446057c17458238db2749c52ee8f0
qemu-kvm Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist

Severity score breakdown

Parameter	Value
Base score	8.2
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

Bugs

https://bugzilla.redhat.com/show_bug.cgi?id=1958978

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