CVE-2020-27821

MEDIUM

QEMU < 5.2.0 - Out-of-bounds Write in Memory Region Cache Initialization

Title source: llm
STIX 2.1

Description

A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.

References (4)

Core 4
Core References
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1902651
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/12/16/6
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210115-0006/
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html

Scores

CVSS v3 6.0
EPSS 0.0004
EPSS Percentile 11.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

Details

CWE
CWE-787
Status published
Products (2)
debian/debian_linux 10.0
qemu/qemu < 5.2.0
Published Dec 08, 2020
Tracked Since Feb 18, 2026