CVE-2025-21843: drm/panthor: avoid garbage value in panthor_ioctl_dev_query()

Severity: medium (CVSS 5.5 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: 2025-03-07 · updated 2026-06-17
Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: avoid garbage value in panthor_ioctl_dev_query() 'priorities_info' is uninitialized, and the uninitialized value is copied to user object when calling PANTHOR_UOBJ_SET(). Using memset to initialize 'priorities_info' to avoid this garbage value problem.

Affected products

Linux kernel: from 6.13 before 6.13.4; 6.14-rc1, 6.14-rc2 — fixed in 6.13.4

How to fix

Upgrade to a fixed version: Linux kernel 6.13.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/3b32b7f638fe61e9d29290960172f4e360e38233
https://git.kernel.org/stable/c/64b95bbc08bacf3e4b05c8604e6a4fec43bb712a

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