Vulnerability in Qemu
CVE-2021-3930
An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
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: 0.003 (27.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Qemu
- Debian Linux — versions 9.0, 10.0
- Red Hat Codeready Linux Builder — versions 8.0
- Red Hat Codeready Linux Builder For IBM Z Systems — versions 8.0
- Red Hat Codeready Linux Builder For Power Little Endian — versions 8.0
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Advanced Virtualization Eus — versions 8.4
- Red Hat Enterprise Linux For IBM Z Systems — versions 8.0
- Red Hat Enterprise Linux For Power Little Endian — versions 8.0
- Red Hat OpenStack — versions 10, 13
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
- security.netapp.com/advisory/ntap-20220225-0007/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/04/msg00002.html (mailing-list, Mailing List, 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-2021-3930?
- CVE-2021-3930 is a medium-severity vulnerability in Qemu, classified under Off-by-one Error. CVSS score: 6.5/10. Published 2022-02-18.
- How severe is CVE-2021-3930?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-3930 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.