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CVE-2026-89769

7.4 · HIGH

In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path When cpuhp_setup_state fails after pit_clockevent_per…

Published Sep 11, 2026EPSS 0.17%

Overview

CVE-2026-89769 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path

When cpuhp_setup_state fails after pit_clockevent_per_cpu_init has

successfully called request_irq, the error handling jumps directly to

out_pit_clocksource_unregister without freeing the registered IRQ.

This leaks the IRQ line and, since kfree(pit) follows, leaves a

dangling pointer registered as the interrupt handler's dev_id,

potentially leading to a use-after-free if the IRQ fires afterwards.

Fix it by calling pit_clockevent_per_cpu_exit to properly release the

IRQ before falling through to the existing cleanup chain.

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/05520e035f8332c8e33f3011b5ca016fde61793dRefgit.kernel.org/stable/c/cdcd861123248e871c2ec2be968b0a1b2a5a34b0Refgit.kernel.org/stable/c/d53c29a89a15e56a1797f3ef249955e544782e04

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89769?

CVE-2026-89769 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-89769?

This vulnerability has a CVSS 3.1 base score of 7.4, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-89769?

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-2026-89769?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89769 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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