Use After Free in Qemu
CVE-2016-9923
Quick Emulator (Qemu) built with the 'chardev' backend support is vulnerable to a use after free issue. It could occur while hotplug and unplugging the device in the guest. A guest user/process could use this flaw to crash a Qemu process on the host resulting in DoS.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (68.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2016/12/09/2 (mailing-list, Patch, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/201701-49 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/94827 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2016-9923?
- CVE-2016-9923 is a medium-severity vulnerability in Qemu, classified under Use After Free. CVSS score: 5.5/10. Published 2016-12-23.
- How severe is CVE-2016-9923?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2016-9923 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.