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Vulnerability DatabaseCVE-2025-38530
CVE-2025-38530:
Linux Debian vulnerability analysis and mitigation
Overview
CVE-2025-38530 is a vulnerability discovered in the Linux kernel's comedi pcl812 driver, disclosed on August 16, 2025. The vulnerability affects the IRQ number validation mechanism in the driver, where an unchecked integer value from userspace could lead to out-of-bounds bit shifts (NVD).
Technical details
The vulnerability exists in the IRQ number validation logic where the test if ((1 << it->options[1]) & board->irq_bits) uses an unchecked integer value from userspace. The shift amount could be negative or out of bounds since it->options[i] is not properly validated. Valid values for it->options[1] should be in the range [1,15], with 0 explicitly disabling interrupt usage (NVD).
Impact
The vulnerability could potentially lead to memory corruption or system instability due to invalid bit shift operations. The issue affects multiple Linux distributions including Debian bullseye, bookworm, and trixie releases (Debian Tracker).
Mitigation and workarounds
The issue has been fixed in several Linux distributions. Debian has patched the vulnerability in bookworm (security) version 6.1.147-1 and trixie (security) version 6.12.41-1. Users are advised to update to these patched versions (Debian Tracker).
Additional resources
Source: This report was generated using AI
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