CVE-2025-71200

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mmc: sdhci-of-dwcmshc: Prevent illegal clock reduction in HS200/HS400 mode<br /> <br /> When operating in HS200 or HS400 timing modes, reducing the clock frequency<br /> below 52MHz will lead to link broken as the Rockchip DWC MSHC controller<br /> requires maintaining a minimum clock of 52MHz in these modes.<br /> <br /> Add a check to prevent illegal clock reduction through debugfs:<br /> <br /> root@debian:/# echo 50000000 &gt; /sys/kernel/debug/mmc0/clock<br /> root@debian:/# [ 30.090146] mmc0: running CQE recovery<br /> mmc0: cqhci: Failed to halt<br /> mmc0: cqhci: spurious TCN for tag 0<br /> WARNING: drivers/mmc/host/cqhci-core.c:797 at cqhci_irq+0x254/0x818, CPU#1: kworker/1:0H/24<br /> Modules linked in:<br /> CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0H Not tainted 6.19.0-rc1-00001-g09db0998649d-dirty #204 PREEMPT<br /> Hardware name: Rockchip RK3588 EVB1 V10 Board (DT)<br /> Workqueue: kblockd blk_mq_run_work_fn<br /> pstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)<br /> pc : cqhci_irq+0x254/0x818<br /> lr : cqhci_irq+0x254/0x818<br /> ...