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CVE-2026-63977

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: dpll: zl3073x: use __dpll_device_change_ntf() and remove change_work The change_work was introduced to send device change notif…

Published Jul 19, 2026EPSS 0.17%

Overview

CVE-2026-63977 is a high-severity vulnerability. It was published on July 19, 2026 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:

dpll: zl3073x: use __dpll_device_change_ntf() and remove change_work

The change_work was introduced to send device change notifications

from DPLL device callbacks without deadlocking on dpll_lock, since

the callbacks are already invoked under that lock. Now that

__dpll_device_change_ntf() is exported for callers that already

hold dpll_lock, use it directly and remove the change_work

infrastructure entirely.

This eliminates a race condition where change_work could be

re-scheduled after cancel_work_sync() during device teardown,

potentially causing the handler to dereference a freed or NULL

dpll_dev pointer.

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/d733f519f6443540f8359461a34e3b0042099bbeRefgit.kernel.org/stable/c/e7a33807fb3f87a855993474ac21684ce105927b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63977?

CVE-2026-63977 is a high-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-63977?

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-2026-63977?

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-2026-63977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63977 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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