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CVE-2025-39882: drm/mediatek: fix potential OF node use-after-free

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-23 · updated 2026-10-19
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: fix potential OF node use-after-free The for_each_child_of_node() helper drops the reference it takes to each node as it iterates over children and an explicit of_node_put() is only needed when exiting the loop early. Drop the recently introduced bogus additional reference count decrement at each iteration that could potentially lead to a use-after-free.

Affected products

• Linux kernel: from 6.6.105 before 6.6.107; from 6.12.45 before 6.12.48; from 6.16.5 before 6.16.8; 6.17-rc4, 6.17-rc5 — fixed in 6.12.48, 6.16.8, 6.6.107

How to fix

Upgrade to a fixed version: Linux kernel 6.12.48, 6.16.8, 6.6.107. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4de37a48b6b58faaded9eb765047cf0d8785ea18
• https://git.kernel.org/stable/c/b2fbe0f9f80b9cfa1e06ddcf8b863d918394ef1d
• https://git.kernel.org/stable/c/b58a26cdd4795c1ce6a80e38e9348885555dacd6
• https://git.kernel.org/stable/c/c4901802ed1ce859242e10af06e6a7752cba0497

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