CVE-2023-53208
kernel: Linux kernel KVM: Denial of Service in nested SVM due to TSC multiplier manipulation
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 15, 2025
Updated · June 30, 2026
Description
A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) nested SVM (nSVM) module. A local attacker with low privileges in a nested virtual machine can manipulate the Timestamp Counter (TSC) multiplier and CPUID features. This manipulation can trigger a kernel warning, leading to a Denial of Service (DoS) by crashing the system.
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
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-670 · Always-Incorrect Control Flow Implementation