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CVE-2021-3638 Details

Description

An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/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=1979858	CVE	Issue TrackingThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK/	CVE	Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/	CVE	Mailing ListThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html	CVE	ExploitMailing ListPatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0003/	CVE	Third Party Advisory
https://ubuntu.com/security/CVE-2021-3638	CVE	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1979858	[email protected]	Issue TrackingThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK/	[email protected]	Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/	[email protected]	Mailing ListThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html	[email protected]	ExploitMailing ListPatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0003/	[email protected]	Third Party Advisory
https://ubuntu.com/security/CVE-2021-3638	[email protected]	Third Party Advisory

see all 12 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	>= 4.0.0, <= 6.1.0
CPE cpe:2.3:a:qemu:qemu:::::::: Remediation No remediation found in references.
fedoraproject fedora	36 37
CPE cpe:2.3:o:fedoraproject:fedora:36:::::::* cpe:2.3:o:fedoraproject:fedora:37:::::::* 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]
Feb 23, 2023	Modified Analysis	[email protected]
Feb 12, 2023	CVE Modified	[email protected]
Jan 19, 2023	CVE Modified	[email protected]
Dec 14, 2022	CVE Modified	[email protected]
Jun 3, 2022	Modified Analysis	[email protected]
Apr 8, 2022	CVE Modified	[email protected]
Mar 15, 2022	Initial Analysis	[email protected]