vulnerability
Red Hat: CVE-2020-27777: CVE-2020-27777 kernel: powerpc: RTAS calls can be used to compromise kernel integrity (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:N/C:C/I:C/A:C) | Dec 15, 2020 | Sep 1, 2021 | Mar 27, 2026 |
Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
Dec 15, 2020
Added
Sep 1, 2021
Modified
Mar 27, 2026
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.
Solution
redhat-upgrade-kernel
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