Medium severity · published Dec 8, 2020
CVE-2020-27821
A flaw was found in the memory management API of QEMU during the initialization of a memory region cache
6.0
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
QE
Qemu · Qemu
before 5.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27821
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27821
Mailing List
http://www.openwall.com/lists/oss-security/2020/12/16/6
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1902651
Mailing List
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210115-0006/
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