CVE-2025-38530

Published Aug 16, 2025

Last updated 4 months ago

CVSS high 7.1

Overview

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.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Analyzed
Products
linux_kernel, debian_linux

Risk scores

CVSS 3.1

Type
Primary
Base score
7.1
Impact score
5.2
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Severity
HIGH

Weaknesses

nvd@nist.gov
CWE-125

Social media

Hype score
Not currently trending

  1. CVE-2025-38530 Linux Kernel Bit Shift Vulnerability in Comedi PCL812 Driver https://t.co/ZpwgnClDnG

    @VulmonFeeds

    16 Aug 2025

    61 Impressions

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  2. CVE-2025-38530 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 follow… https://t.co/IdyB7kv0u7

    @CVEnew

    16 Aug 2025

    310 Impressions

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Configurations

Related CVEs

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References

Sources include official advisories and independent security research.