VULNERABILITY INTELLIGENCE

CVE-2020-27777

CVSS score6.7 MEDIUM
EPSS probability0.48%
CISA KEVNot currently listed
Published2020-12-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Description

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.

Weakness classification

  • secalert@redhat.com: CWE-862

Primary references