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CVE-2020-27821

Public on 2020-12-08
Modified on 2021-06-22
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.

Severity
Medium
See what this means
CVSS v3 Base Score
5.7
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core qemu 2021-06-16 20:37 ALAS2-2021-1671

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
NVD CVSSv3 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
NVD CVSSv2 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

References

Red Hat: CVE-2020-27821 Mitre: CVE-2020-27821 FAQs regarding Amazon Linux ALAS/CVE Severity