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CVE-2025-40176

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: tls: wait for pending async decryptions if tls_strp_msg_hold fails Async decryption calls tls_strp_msg_hold to create a clone o…

Published Nov 12, 2025EPSS 0.46%

Overview

CVE-2025-40176 is a critical-severity vulnerability. It was published on November 12, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

tls: wait for pending async decryptions if tls_strp_msg_hold fails

Async decryption calls tls_strp_msg_hold to create a clone of the

input skb to hold references to the memory it uses. If we fail to

allocate that clone, proceeding with async decryption can lead to

various issues (UAF on the skb, writing into userspace memory after

the recv() call has returned).

In this case, wait for all pending decryption requests.

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/39dec4ea3daf77f684308576baf483b55ca7f160Refgit.kernel.org/stable/c/4fc109d0ab196bd943b7451276690fb6bb48c2e0Refgit.kernel.org/stable/c/9f83fd0c179e0f458e824e417f9d5ad53443f685Refgit.kernel.org/stable/c/b8a6ff84abbcbbc445463de58704686011edc8e1Refgit.kernel.org/stable/c/c61d4368197d65c4809d9271f3b85325a600586a

How CyberStrike helps

Frequently asked questions

What is CVE-2025-40176?

CVE-2025-40176 is a critical-severity vulnerability. It was published on November 12, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-40176?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-40176?

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-2025-40176?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-40176 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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