PT-2025-37650 · Linux+3 · Linux Kernel+3

Published 2023-08-03 · Updated 2026-04-14 · CVE-2023-53208

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw within the KVM nested virtualization implementation. Specifically, the code incorrectly loads the Time Stamp Counter (TSC) multiplier for L1 based on L1 state rather than L2 state during nested VM-Exit emulation. This can lead to a warning message and potentially unexpected behavior when userspace manipulates the MSR and CPUID features. The issue arises because the assertion that TSC scaling is exposed to L1 is flawed, allowing userspace to trigger a warning by writing to the MSR and updating the guest CPUID.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2026-02047

CVE-2023-53208

RHSA-2024:2394

SUSE-SU-2025:03600-1

SUSE-SU-2025:03634-1

SUSE-SU-2025:20851-1

SUSE-SU-2025:20861-1

SUSE-SU-2025:20870-1

SUSE-SU-2025:20898-1

SUSE-SU-2025:3751-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4141-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 1409

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53208.json · Exploit
• https://ubuntu.com/security/CVE-2023-53208 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03600-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4057-1 · Vendor Advisory
• https://git.kernel.org/stable/c/5b2b0535fa7adee7e295fed0a3095082131a8d05 · Patch
• https://bdu.fstec.ru/vul/2026-02047 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-53208 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-53208 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20870-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4132-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20898-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20851-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53208 · Vendor Advisory
• https://git.kernel.org/stable/c/e91c07f6cf7060d2acb3aeee31a6baebe3773d3f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53208 · Security Note