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CVE-2025-38530

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: comedi: pcl812: Fix bit shift out of bounds When checking for a supported IRQ number, the following test is used: if ((1 << i…

Published Aug 16, 2025CWE-125EPSS 0.18%

Overview

CVE-2025-38530 is a high-severity vulnerability. It was published on August 16, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, 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:

comedi: pcl812: Fix bit shift out of bounds

When checking for a supported IRQ number, the following test is used:

if ((1 << it->options[1]) & board->irq_bits) {

However, `it->options[i]` is an unchecked `int` value from userspace, so

the shift amount could be negative or out of bounds. Fix the test by

requiring `it->options[1]` to be within bounds before proceeding with

the original test. Valid `it->options[1]` values that select the IRQ

will be in the range [1,15]. The value 0 explicitly disables the use of

interrupts.

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/0489c30d080f07cc7f09d04de723d8c2ccdb61efRefgit.kernel.org/stable/c/16c173abee315953fd17a279352fec4a1faee862Refgit.kernel.org/stable/c/29ef03e5b84431171d6b77b822985b54bc44b793Refgit.kernel.org/stable/c/374d9b3eb4b08407997ef1fce96119d31e0c0bc4Refgit.kernel.org/stable/c/5bfa301e1e59a9b1a7b62a800b54852337c97416Refgit.kernel.org/stable/c/7e470d8efd10725b189ca8951973a8425932398aRefgit.kernel.org/stable/c/a27e27eee313fe1c450b6af1e80e64412546cab4Refgit.kernel.org/stable/c/b14b076ce593f72585412fc7fd3747e03a5e3632Reflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38530?

CVE-2025-38530 is a high-severity vulnerability. It was published on August 16, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-38530?

This vulnerability has a CVSS 3.1 base score of 7.1, 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-2025-38530?

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-2025-38530?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38530 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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