Use After Free in Qemu
CVE-2022-0216
A use-after-free vulnerability was found in the LSI53C895A SCSI Host Bus Adapter emulation of QEMU. The flaw occurs while processing repeated messages to cancel the current SCSI request via the lsi_do_msgout function. This flaw allows a malicious privileged user within the guest to crash the QEMU process on the host, resulting in a denial of service.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.4% 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
- Fedoraproject Fedora — versions 37
- Qemu — versions Affects QEMU < v6.0.0, Fixed in v7.1.0-rc0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- starlabs.sg/advisories/22/22-0216/ (Exploit, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- gitlab.com/qemu-project/qemu/-/issues/972 (Exploit, Third Party Advisory)
- gitlab.com/qemu-project/qemu/-/commit/4367a20cc4 (Patch, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2022-0216 (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-0216?
- CVE-2022-0216 is a medium-severity vulnerability in Qemu, classified under Use After Free. CVSS score: 4.4/10. Published 2022-08-26.
- How severe is CVE-2022-0216?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2022-0216 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.