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CVE-2020-27821 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=1902651	CVE	Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	CVE	Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20210115-0006/	CVE	Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/16/6	CVE	Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1902651	[email protected]	Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	[email protected]	Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20210115-0006/	[email protected]	Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/16/6	[email protected]	Mailing ListThird Party Advisory

see all 8 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]
CWE-787	Out-of-bounds Write	[email protected]

Affected Products

Product	Versions
qemu qemu	< 5.2.0
CPE cpe:2.3:a:qemu:qemu:::::::: Remediation No remediation found in references.
debian debian linux	10.0
CPE cpe:2.3:o:debian:debian_linux:10.0:::::::* Remediation No remediation found in references.

Change History

10 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Sep 30, 2022	Modified Analysis	[email protected]
Sep 5, 2022	CVE Modified	[email protected]
Aug 6, 2022	Modified Analysis	[email protected]
Jan 15, 2021	CVE Modified	[email protected]
Dec 16, 2020	CVE Modified	[email protected]
Dec 10, 2020	Initial Analysis	[email protected]