CVE-2022-50417: drm/panfrost: Fix GEM handle creation ref-counting

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: 2025-09-18 · updated 2026-06-17
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: drm/panfrost: Fix GEM handle creation ref-counting panfrost_gem_create_with_handle() previously returned a BO but with the only reference being from the handle, which user space could in theory guess and release, causing a use-after-free. Additionally if the call to panfrost_gem_mapping_get() in panfrost_ioctl_create_bo() failed then a(nother) reference on the BO was dropped. The _create_with_handle() is a problematic pattern, so ditch it and instead create the handle in panfrost_ioctl_create_bo(). If the call to panfrost_gem_mapping_get() fails then this means that user space has indeed gone behind our back and freed the handle. In which case just return an error code.

Affected products

Linux kernel: from 5.2 before 5.10.163; from 5.11 before 5.15.87; from 5.16 before 6.0.19; from 6.1 before 6.1.5; 6.2-rc1, 6.2-rc2 — fixed in 5.10.163, 5.15.87, 6.0.19, 6.1.5

How to fix

Upgrade to a fixed version: Linux kernel 5.10.163, 5.15.87, 6.0.19, 6.1.5. Check the vendor advisory for mitigations.

References

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