Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | < 5.2.0 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/12/16/6Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1902651Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210115-0006/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/12/16/6Mailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1902651Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20210115-0006/Third Party Advisory
FAQ
What is CVE-2020-27821?
CVE-2020-27821 is a vulnerability with a CVSS score of 6.0 (MEDIUM). 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 MMI...
How severe is CVE-2020-27821?
CVE-2020-27821 has been rated MEDIUM with a CVSS base score of 6.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-27821?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Debian Debian Linux.