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CVE-2026-52979

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: psp: check for device unregister when creating assoc psp_assoc_device_get_locked() obtains a psp_dev reference via psp_dev…

Published Jun 24, 2026CWE-667EPSS 0.12%

Overview

CVE-2026-52979 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

net: psp: check for device unregister when creating assoc

psp_assoc_device_get_locked() obtains a psp_dev reference via

psp_dev_get_for_sock() (which uses psp_dev_tryget() under RCU);

it then acquires psd->lock and drops the reference. Before

the lock is taken, psp_dev_unregister() can run to completion:

take psd->lock, clear out state, unlock, drop the registration

reference.

The expectation is that the lock prevents device unregistration,

but much like with netdevs special care has to be taken when

"upgrading" a reference to a locked device. Add the missing

check if device is still alive. psp_dev_is_registered() exists

already but had no callers, which makes me wonder if I either

forgot to add this or lost the check during refactoring...

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/b89769f936a8fa9e66de72ddc1b71a9745a488e6Refgit.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9Refgit.kernel.org/stable/c/e201c57073e624dd2ba5beaf9eda31e19b77b332

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52979?

CVE-2026-52979 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-52979?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-52979?

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-2026-52979?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52979 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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