Vulnerability in Qemu
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. 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Qemu
- Debian Linux — versions 9.0, 10.0
- Fedoraproject Fedora — versions 33
- Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
- Qemu — versions versions up to and including 5.2.0
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2021/02/26/1 (Patch, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/04/msg00009.html (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210507-0002/ (Third Party Advisory)
- security.gentoo.org/glsa/202208-27 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/09/msg00008.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3416?
- CVE-2021-3416 is a medium-severity vulnerability in Qemu, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.0/10. Published 2021-03-18.
- How severe is CVE-2021-3416?
- Medium severity. CVSS v3 base score is 6.0 out of 10.