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

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-13 · updated 2026-06-17
Weakness: CWE-416

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.

Affected products

Linux kernel: from 6.0.16 before 6.1; from 6.1.2 before 6.1.160; from 6.2.1 before 6.6.120; from 6.7 before 6.12.64; from 6.13 before 6.18.3; 6.2, 6.19-rc1, 6.19-rc2, 6.19-rc3, 6.19-rc4, 6.19-rc5 (+3) — fixed in 6.1, 6.1.160, 6.12.64, 6.18.3, 6.6.120

How to fix

Upgrade to a fixed version: Linux kernel 6.1, 6.1.160, 6.12.64, 6.18.3. Check the vendor advisory for mitigations.

References

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