CVE-2023-53389 drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached

What is CVE-2023-53389?

CVE-2023-53389 is a medium-severity vulnerability in Linux kernel, published on 18 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached

The MediaTek DisplayPort interface bridge driver starts its interrupts as soon as its probed. However when the interrupts trigger the bridge might not have been attached to a DRM device. As drm_helper_hpd_irq_event() does not check whether the passed in drm_device is valid or not, a NULL pointer passed in results in a kernel NULL pointer dereference in it.

Check whether the bridge is attached and only trigger an HPD event if it is.

Weakness: CWE-476

Which versions are affected by CVE-2023-53389?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53389?

Apply the vendor's patch.

Is CVE-2023-53389 being exploited?

There is no known exploitation of CVE-2023-53389 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-53389, DEBIAN-CVE-2023-53389, GHSA-gvwq-vp5c-rpm6, UBUNTU-CVE-2023-53389.