CVE-2025-61553

What it is

An out-of-bounds write in VirtIO network device emulation in BitVisor from commit 108df6 (2020-05-20) to commit 480907 (2025-07-06) allows local attackers to cause a denial of service (host hypervisor crash) via a crafted PCI configuration space access. Given it's a heap overflow in a privileged hypervisor context, exploitation may enable arbitrary code execution or guest-to-host privilege escalation.

At a glance

Exploitability

Can be exploited locally on the machine with an admin-level account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2025-10-16 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-11-05 22:10 UTC Last updatedMost recent change to the record

Details

Published

2025-10-16 19:15 UTC

Last modified

2026-11-05 22:10 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-122

Record status

Deferred

Attack profile CVSS 3.1 · 8.2

Attack vector

Local

Complexity

Low

Privileges needed

High

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High