CVE-2026-53152
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk6th percentile — higher than 6% of all known CVEs
Summary
In the Linux kernel MMC driver for old Rockchip controllers (rk2928, rk3066, rk3188), missing private data structure caused NULL-pointer dereference after adding memory clock auto-gating support. This affects Linux kernel.
Risk Assessment
The organization may experience system crashes (kernel panic) on older Rockchip platforms during MMC operations, leading to service disruptions.
Recommendation
Update the Linux kernel to a version containing the fix (commit that adds missing private data for old controllers).
Original NVD description (English source)
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.