CVE-2020-27777

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.

References

https://www.openwall.com/lists/oss-security/2020/11/23/2

https://bugzilla.redhat.com/show_bug.cgi?id=1900844

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3