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CVE-2025-40149

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock().

Published Nov 12, 2025CWE-416EPSS 0.17%

Overview

CVE-2025-40149 is a high-severity vulnerability. It was published on November 12, 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:

tls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock().

get_netdev_for_sock() is called during setsockopt(),

so not under RCU.

Using sk_dst_get(sk)->dev could trigger UAF.

Let's use __sk_dst_get() and dst_dev_rcu().

Note that the only ->ndo_sk_get_lower_dev() user is

bond_sk_get_lower_dev(), which uses RCU.

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/13159c7125636371543a82cb7bbae00ab36730ccRefgit.kernel.org/stable/c/2b1bef126bbb8d0da51491357559126d567c1deeRefgit.kernel.org/stable/c/c65f27b9c3be2269918e1cbad6d8884741f835c5Refgit.kernel.org/stable/c/e37ca0092ddace60833790b4ad7a390408fb1be9Refgit.kernel.org/stable/c/f09cd209359a23f88d4f3fa3d2379d057027e53cRefgit.kernel.org/stable/c/feb474ddbf26b51f462ae2e60a12013bdcfc5407Refcert-portal.siemens.com/productcert/html/ssa-019113.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-40149?

CVE-2025-40149 is a high-severity vulnerability. It was published on November 12, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-40149?

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-2025-40149?

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-2025-40149?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-40149 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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