CVE-2025-39740: drm/xe/migrate: prevent potential UAF

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: 2025-09-11 · updated 2026-10-19
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/migrate: prevent potential UAF If we hit the error path, the previous fence (if there is one) has already been put() prior to this, so doing a fence_wait could lead to UAF. Tweak the flow to do to the put() until after we do the wait. (cherry picked from commit 9b7ca35ed28fe5fad86e9d9c24ebd1271e4c9c3e)

Affected products

Linux kernel: from 6.16 before 6.16.2; 6.17-rc1 — fixed in 6.16.2

How to fix

Upgrade to a fixed version: Linux kernel 6.16.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/145832fbdd17b1d77ffd6cdd1642259e101d1b7e
https://git.kernel.org/stable/c/7e46fa64a4b94208563c3a5bf1d7f4346f94abea

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