CVE-2020-16092

Publication date 11 August 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in hw/net/net_tx_pkt.c.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	20.04 LTS focal	Fixed 1:4.2-3ubuntu6.4
	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.31
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
qemu-kvm	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

Patch details

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

Package	Patch details
qemu	Upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=035e69b063835a5fd23cacabd63690a3d84532a8

Severity score breakdown

Parameter	Value
Base score	3.8 · Low
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

USN-4467-1
QEMU vulnerabilities
19 August 2020