CVEvulnerability

CVE-2020-27777

6.7 MEDIUM Published 2020-12-15 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-12-15
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.7 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
Weaknesses
CWE-862

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.

Affected configurations

• linux linux kernel (< 4.14.204) • linux linux kernel (>= 4.15 < 4.19.155) • linux linux kernel (>= 4.20 < 5.4.75) • linux linux kernel (>= 5.5 < 5.9.5) • redhat openshift container platform 4.4 • redhat openshift container platform 4.5 • redhat openshift container platform 4.6 • redhat enterprise linux 5.0 • redhat enterprise linux 6.0 • redhat enterprise linux 7.0 • redhat enterprise linux 8.0

Related

Weakness · CWE (1)

  • CWE-862 Missing Authorization weakness

References