Vulnerability in Red Hat Enterprise Linux
CVE-2020-14339
A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.1% 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
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Libvirt
- Libvirt — versions libvirt 6.6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/202101-22 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202210-06 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-14339?
- CVE-2020-14339 is a high-severity vulnerability in Red Hat Enterprise Linux, classified under Missing Release of Resource after Effective Lifetime. CVSS score: 8.8/10. Published 2020-12-03.
- How severe is CVE-2020-14339?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-14339 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.