CVE-2020-13754

Publication date 2 June 2020

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address in an msi-x mmio operation.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Fixed 1:4.2-3ubuntu6.4
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Fixed 1:2.11+dfsg-1ubuntu7.31
	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.45
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.47+esm1
qemu-kvm	21.04 hirsute	Not in release
	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	19.10 eoan	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

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Notes

mdeslaur

the fix for this issue introduced a regression, see: https://bugs.launchpad.net/qemu/+bug/1886318

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=5d971f9e672507210e77d020d89e0e89165c8fc9 Upstream: https://git.qemu.org/?p=qemu.git;a=commit;h=dba04c3488c4699f5afe96f66e448b1d447cf3fb

Severity score breakdown

Parameter	Value
Base score	6.7 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H