Use After Free in Linux Kernel
CVE-2020-27820
A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% 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
- Linux Kernel — versions 2.6.12
- Oracle Communications Cloud Native Core Binding Support Function — versions 22.1.3
- Oracle Communications Cloud Native Core Network Exposure Function — versions 22.1.1
- Oracle Communications Cloud Native Core Policy — versions 22.2.0
- Fedoraproject Fedora — versions 33
- Kernel — versions to be fixed in RHEL-9 release
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com/ (Mailing List, Vendor Advisory)
- lore.kernel.org/dri-devel/20201103194912.184413-3-jcline@redhat.com/ (Mailing List, Vendor Advisory)
- lore.kernel.org/dri-devel/20201103194912.184413-4-jcline@redhat.com/ (Mailing List, Vendor Advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27820?
- CVE-2020-27820 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 4.7/10. Published 2021-11-03.
- How severe is CVE-2020-27820?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2020-27820 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.