CVE-2021-3638

Public Exploit

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org
Affected: n/a QEMU
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1979858 issue tracking third party advisory
https://ubuntu.com/security/CVE-2021-3638 third party advisory
https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html mailing list patch exploit third party advisory
https://security.netapp.com/advisory/ntap-20220407-0003/ third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/ mailing list third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK/ mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3638?
CVE-2021-3638 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3638?
To fix CVE-2021-3638, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3638 being actively exploited in the wild?
It is possible that CVE-2021-3638 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3638?
CVE-2021-3638 affects n/a QEMU.
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