CVE-2023-54047
Unknown Unknown - Not Provided
Use-After-Free in Linux drm/rockchip HDMI Encoder Causes Crash

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/rockchip: dw_hdmi: cleanup drm encoder during unbind This fixes a use-after-free crash during rmmod. The DRM encoder is embedded inside the larger rockchip_hdmi, which is allocated with the component. The component memory gets freed before the main drm device is destroyed. Fix it by running encoder cleanup before tearing down its container. [moved encoder cleanup above clk_disable, similar to bind-error-path]
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54047
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's drm/rockchip driver, specifically in the dw_hdmi component. The problem occurs because the DRM encoder, which is part of the rockchip_hdmi component, is not properly cleaned up before the component's memory is freed during module removal (rmmod). This leads to a crash. The fix involves cleaning up the encoder before tearing down its container to prevent the use-after-free condition.

Impact Analysis

This vulnerability can cause a crash in the Linux kernel when the affected module is removed, potentially leading to system instability or denial of service. It may affect systems using the rockchip HDMI driver, causing unexpected behavior or downtime during module unload operations.

Mitigation Strategies

To mitigate this vulnerability, update your Linux kernel to a version that includes the fix for the drm/rockchip dw_hdmi use-after-free issue during rmmod. This fix involves proper cleanup of the DRM encoder before tearing down its container, preventing the crash. Avoid unloading the affected module until the update is applied.

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