# CVE-2023-53389: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/mediatek: dp: Only trigger DRM HPD events if...

CVE-2023-53389 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53389, released September 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53389
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.37-1 | [DEBIAN-CVE-2023-53389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53389.md) | Sep 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-53389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53389.md) | Sep 18, 2025 |
| Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-53389](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53389.md) | Sep 18, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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