Medium severity · published Mar 18, 2021
CVE-2021-3416
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0
6.0
CVSS
0.5%
EPSS
No
On KEV
Description
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.
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)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
EL
Enterprise Linux · Redhat
6.0; 7.0; 8.0; 8.0 · source: NVD
FE
Fedora · Fedoraproject
33 · source: NVD
QE
Qemu · Qemu
through 5.2.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3416
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3416
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1932827
Mailing List
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
Mailing List
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Third Party Advisory
https://security.gentoo.org/glsa/202208-27
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210507-0002/
Mailing List
https://www.openwall.com/lists/oss-security/2021/02/26/1
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