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CVE-2025-68333

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: sched_ext: Fix possible deadlock in the deferred_irq_workfn() For PREEMPT_RT=y kernels, the deferred_irq_workfn() is executed i…

Published Dec 22, 2025CWE-667EPSS 0.11%

Overview

CVE-2025-68333 is a medium-severity vulnerability. It was published on December 22, 2025 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:

sched_ext: Fix possible deadlock in the deferred_irq_workfn()

For PREEMPT_RT=y kernels, the deferred_irq_workfn() is executed in

the per-cpu irq_work/* task context and not disable-irq, if the rq

returned by container_of() is current CPU's rq, the following scenarios

may occur:

lock(&rq->__lock);

<Interrupt>

lock(&rq->__lock);

This commit use IRQ_WORK_INIT_HARD() to replace init_irq_work() to

initialize rq->scx.deferred_irq_work, make the deferred_irq_workfn()

is always invoked in hard-irq context.

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/541959b2fadb832a7d0ceb95041dc52bdcf6bff7Refgit.kernel.org/stable/c/600b4379b9a7ba41340d652211fb29699da4c629Refgit.kernel.org/stable/c/a257e974210320ede524f340ffe16bf4bf0dda1e

How CyberStrike helps

Frequently asked questions

What is CVE-2025-68333?

CVE-2025-68333 is a medium-severity vulnerability. It was published on December 22, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-68333?

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-2025-68333?

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-2025-68333?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-68333 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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