Medium severity · published Feb 24, 2022
CVE-2021-3608
A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0
6.0
CVSS
0.4%
EPSS
No
On KEV
Description
A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest and may result in a crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest threat from this vulnerability is to system availability.
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
FE
Fedora · Fedoraproject
34 · source: NVD
QE
Qemu · Qemu
before 6.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3608
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3608
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1973383
Mailing List
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
Mailing List
https://lists.gnu.org/archive/html/qemu-devel/2021-06/msg07926.html
Third Party Advisory
https://security.gentoo.org/glsa/202208-27
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220318-0002/
More from Debian Linux
10.0
CVE-2025-32433
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2026-111497
Out-of-Bounds Write in Google Brotli Decoder