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CVE-2025-38618

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: vsock: Do not allow binding to VMADDR_PORT_ANY It is possible for a vsock to autobind to VMADDR_PORT_ANY.

Published Aug 22, 2025CWE-416EPSS 0.17%

Overview

CVE-2025-38618 is a high-severity vulnerability. It was published on August 22, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

vsock: Do not allow binding to VMADDR_PORT_ANY

It is possible for a vsock to autobind to VMADDR_PORT_ANY. This can

cause a use-after-free when a connection is made to the bound socket.

The socket returned by accept() also has port VMADDR_PORT_ANY but is not

on the list of unbound sockets. Binding it will result in an extra

refcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep

the binding until socket destruction).

Modify the check in __vsock_bind_connectible() to also prevent binding

to VMADDR_PORT_ANY.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865Refgit.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7Refgit.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1Refgit.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4Refgit.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302deRefgit.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79Refgit.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386Refgit.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87Refgit.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3Reflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38618?

CVE-2025-38618 is a high-severity vulnerability. It was published on August 22, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-38618?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-38618?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-38618?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38618 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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