CVE-2020-27777CWE-862

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication

published December 15, 2020

CVSS
—
EPSS
0%
Percentile
40.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00476 · 40.2th percentile
Weakness
CWE-862 · Missing Authorization
Published
2020-12-15T16:57Z
EPSS history
Timeline
  • 15 DEC 16:57Z
    A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication
    cvelistv5