CVE-2020-27777 | BDVDB-2026-146049 Detail

kernel

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.

Impact#

No impact statement in the source data.

Weaknesses#

CWE-862 Missing Authorization

References#

https://bugzilla.redhat.com/show_bug.cgi?id=1900844
https://www.openwall.com/lists/oss-security/2020/10/09/1
https://www.openwall.com/lists/oss-security/2020/11/23/2
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=bd59380c5ba4147dcbaad3e582b55ccfd120b764

Exploit#

No public exploit known

History#

Version 12020-12-15Record published in the CVE List.
Version 22024-08-04Most recent update recorded in the CVE List.