CVE-2025-58150 x86: buffer overrun with shadow paging + tracing

High 8.8 Published 28 Jan 2026 Updated 28 Jan 2026

A buffer overrun in Xen's shadow paging tracing allows guest-controlled data to overwrite memory, potentially enabling code execution or privilege escalation.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2025-58150?

CVE-2025-58150 is a high-severity memory corruption vulnerability in Xen Xen, published on 28 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing. Some of these variables are written to with guest controlled data, of guest controllable size. That size can be larger than the variable, and bounding of the writes was missing.

Weakness: CWE-787

Which versions are affected by CVE-2025-58150?

It affects 1 product.

Products include Xen Xen.

How do I fix CVE-2025-58150?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-58150 being exploited?

There is no known exploitation of CVE-2025-58150 in the wild and no public exploit code.

All Xen Xen vulnerabilities

Sources

Also known as ALPINE-CVE-2025-58150, DEBIAN-CVE-2025-58150, GHSA-vq9r-cp35-p48q, UBUNTU-CVE-2025-58150.