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
EPSS: 0.005 (37.9th percentile) — read the EPSS interpretation.
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.
Affected products
- Linux 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
- N/a Kernel — versions to be fixed in RHEL-9 release
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Mailing List, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (Mailing List, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (Mailing List, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC)
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.