CVE-2026-53152 mmc: dw_mmc-rockchip: Add missing private data for very old controllers
A null pointer dereference in the Rockchip MMC driver causes a kernel crash on older SoCs, leading to denial of service.
- 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-2026-53152?
CVE-2026-53152 is a medium-severity vulnerability in Linux kernel, published on 25 Jun 2026. 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:
mmc: dw_mmc-rockchip: Add missing private data for very old controllers
The really old controllers (rk2928, rk3066, rk3188) do not support UHS speeds at all, and thus never handled phase data.
For that reason it never had a parse_dt callback and no driver private data at all.
Commit ff6f0286c896 ("mmc: dw_mmc-rockchip: Add memory clock auto-gating support") makes the private data sort of mandatory, because the init function checks whether phases are configured internally or through the clock controller.
This results in the old SoCs then experiencing NULL-pointer dereferences when they try to access that private-data struct.
While we could have if (priv) conditionals in all places, it's way less cluttery to just give the old types their private-data struct.
Weakness: CWE-476
Which versions are affected by CVE-2026-53152?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53152?
Apply the vendor's patch.
Is CVE-2026-53152 being exploited?
There is no known exploitation of CVE-2026-53152 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53152, DEBIAN-CVE-2026-53152, GHSA-38rg-2rjc-3rmj, UBUNTU-CVE-2026-53152.