Medium severity · published Mar 3, 2022
CVE-2021-3638
An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
36; 37 · source: NVD
QE
Qemu · Qemu
4.0.0 through 6.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3638
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3638
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1979858
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/
Exploit
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220407-0003/
Third Party Advisory
https://ubuntu.com/security/CVE-2021-3638
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