Vulnerability in Qemu
CVE-2021-3544
Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Qemu
- Debian Linux — versions 11.0
- Qemu — versions All QEMU versions up to and including 6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2021/05/31/1 (mailing-list, Mailing List, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Issue Tracking)
- security.netapp.com/advisory/ntap-20210720-0008/ (Third Party Advisory)
- www.debian.org/security/2021/dsa-4980 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202208-27 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3544?
- CVE-2021-3544 is a medium-severity vulnerability in Qemu, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2021-06-02.
- How severe is CVE-2021-3544?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-3544 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.