CVE-2023-52634 drm/amd/display: Fix disable_otg_wa logic

What is CVE-2023-52634?

CVE-2023-52634 is a medium-severity denial of service vulnerability in Linux kernel, published on 2 Apr 2024. 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/amd/display: Fix disable_otg_wa logic

[Why] When switching to another HDMI mode, we are unnecesarilly disabling/enabling FIFO causing both HPO and DIG registers to be set at the same time when only HPO is supposed to be set.

This can lead to a system hang the next time we change refresh rates as there are cases when we don't disable OTG/FIFO but FIFO is enabled when it isn't supposed to be.

[How] Removing the enable/disable FIFO entirely.

Which versions are affected by CVE-2023-52634?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-52634?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-52634 being exploited?

There is no known exploitation of CVE-2023-52634 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-2023-52634, DEBIAN-CVE-2023-52634, GHSA-gjgq-73mh-6p69, ROOT-OS-UBUNTU-2204-CVE-2023-52634, UBUNTU-CVE-2023-52634.