CVE-2024-35942 pmdomain: imx8mp-blk-ctrl: imx8mp_blk: Add fdcc clock to hdmimix domain
A missing clock configuration in the i.MX8MP HDMI driver causes kernel warnings and potential display subsystem failures, impacting system stability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-35942?
CVE-2024-35942 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 May 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:
pmdomain: imx8mp-blk-ctrl: imx8mp_blk: Add fdcc clock to hdmimix domain
According to i.MX8MP RM and HDMI ADD, the fdcc clock is part of hdmi rx verification IP that should not enable for HDMI TX. But actually if the clock is disabled before HDMI/LCDIF probe, LCDIF will not get pixel clock from HDMI PHY and print the error logs:
[CRTC:39:crtc-2] vblank wait timed out WARNING: CPU: 2 PID: 9 at drivers/gpu/drm/drm_atomic_helper.c:1634 drm_atomic_helper_wait_for_vblanks.part.0+0x23c/0x260
Add fdcc clock to LCDIF and HDMI TX power domains to fix the issue.
Which versions are affected by CVE-2024-35942?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-35942?
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-2024-35942 being exploited?
There is no known exploitation of CVE-2024-35942 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-35942, DEBIAN-CVE-2024-35942, GHSA-f5cr-rmgv-7qv3, ROOT-OS-DEBIAN-12-CVE-2024-35942, ROOT-OS-UBUNTU-2204-CVE-2024-35942, UBUNTU-CVE-2024-35942.