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CVE-2024-56538: drm: zynqmp_kms: Unplug DRM device before removal

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-12-27 · updated 2026-10-30
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: drm: zynqmp_kms: Unplug DRM device before removal Prevent userspace accesses to the DRM device from causing use-after-frees by unplugging the device before we remove it. This causes any further userspace accesses to result in an error without further calls into this driver's internals.

Affected products

• Linux kernel: from 5.9 before 6.6.64; from 6.7 before 6.11.11; from 6.12 before 6.12.2 — fixed in 6.6.64, 6.11.11, 6.12.2
• Linux: 5.9 — fixed in 6.13

How to fix

Upgrade to a fixed version: Linux kernel 6.6.64, 6.11.11, 6.12.2; Linux 6.13. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0c8ca1da81e5a9787284eb84c0c6ae927f063c15
• https://git.kernel.org/stable/c/2e07c88914fc5289c21820b1aa94f058feb38197
• https://git.kernel.org/stable/c/4fb97432e28a7e136b2d76135d50e988ada8e1af
• https://git.kernel.org/stable/c/692f52aedccbf79b212a1e14e3735192b4c24a7d
• https://git.kernel.org/stable/c/a17b9afe58c474657449cf87e238b1788200576b

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