CVE-2021-37576
kernel: powerpc: KVM guest OS users can cause host OS memory corruption
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 23, 2021
Updated · August 7, 2026
Description
A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtas_args.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-1284 · Improper Validation of Specified Quantity in Input