CVE-2020-27821

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.

• CWE-787
• CWE-787

• http://www.openwall.com/lists/oss-security/2020/12/16/6Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1902651Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210115-0006/Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/12/16/6Mailing List, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1902651Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210115-0006/Third Party Advisory

Published

Dec 8, 2020

Last Modified

Jun 17, 2026

Status

Modified

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