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5.5
CVE-2023-53389: Linux kernel MediaTek DisplayPort driver may crash system
CVE-2023-53389 · published 1 year ago
Summary
The MediaTek DisplayPort driver in the Linux kernel can start handling interrupts before it is fully connected to the graphics subsystem. If this happens, the driver may try to use a missing reference and cause the system to crash. Updating to a kernel version that includes the fix will prevent the crash.
What to do
- Update debian linux to version 6.1.37-1.
- Update debian linux to version 6.3.7-1.
- Update linux kernel to version 6.3.2.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| – | linux | linux_kernel |
>= 6.1, < 6.1.28 >= 6.2, < 6.2.15 >= 6.3, < 6.3.2 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Debian:12 | debian | linux |
< 6.1.37-1 Fix: upgrade to 6.1.37-1
|
| Debian:13 | debian | linux |
< 6.3.7-1 Fix: upgrade to 6.3.7-1
|
| Linux | linux | kernel |
>= 6.3.0, < 6.3.2 Fix: upgrade to 6.3.2
|
Original advisory text
drm/mediatek: dp: Only trigger DRM HPD events if bridge is attached
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.
References
- https://git.kernel.org/stable/c/3551789d0635dfb2df8ab8e7fdbf0647e9c1724c URL
- https://git.kernel.org/stable/c/36b617f7e4ae663fcadd202ea061ca695ca75539 URL
- https://git.kernel.org/stable/c/6524d3d58797975cc40b85be1e9b89721b4e8d0b URL
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Product
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53389... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2023-53389 Vendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2023-53389 Vendor Advisory
- https://git.kernel.org/stable/c/d1c04e338016ae2517c641806a831b1f3eee2bed URL
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Type
CWE-476NULL Pointer Dereference
Timeline
Published18 Sep 2025
Updated26 Oct 2026
First seen7 Mar 2026
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