CVE-2020-27821

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

Link	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1902651	patch third party advisory issue tracking
http://www.openwall.com/lists/oss-security/2020/12/16/6	third party advisory mailing list
https://security.netapp.com/advisory/ntap-20210115-0006/	third party advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html	third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-27821?: CVE-2020-27821 has been scored as a medium severity vulnerability.
How to fix CVE-2020-27821?: To fix CVE-2020-27821, 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-2020-27821 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2020-27821 is being actively exploited. 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-2020-27821?: CVE-2020-27821 affects n/a QEMU.

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Description

Category

CWE-787 – Out-of-bounds Write

References

Frequently Asked Questions