{"id":"CVE-2025-71200","summary":"mmc: sdhci-of-dwcmshc: Prevent illegal clock reduction in HS200/HS400 mode","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: sdhci-of-dwcmshc: Prevent illegal clock reduction in HS200/HS400 mode\n\nWhen operating in HS200 or HS400 timing modes, reducing the clock frequency\nbelow 52MHz will lead to link broken as the Rockchip DWC MSHC controller\nrequires maintaining a minimum clock of 52MHz in these modes.\n\nAdd a check to prevent illegal clock reduction through debugfs:\n\nroot@debian:/# echo 50000000 \u003e /sys/kernel/debug/mmc0/clock\nroot@debian:/# [   30.090146] mmc0: running CQE recovery\nmmc0: cqhci: Failed to halt\nmmc0: cqhci: spurious TCN for tag 0\nWARNING: drivers/mmc/host/cqhci-core.c:797 at cqhci_irq+0x254/0x818, CPU#1: kworker/1:0H/24\nModules linked in:\nCPU: 1 UID: 0 PID: 24 Comm: kworker/1:0H Not tainted 6.19.0-rc1-00001-g09db0998649d-dirty #204 PREEMPT\nHardware name: Rockchip RK3588 EVB1 V10 Board (DT)\nWorkqueue: kblockd blk_mq_run_work_fn\npstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : cqhci_irq+0x254/0x818\nlr : cqhci_irq+0x254/0x818\n...","modified":"2026-04-02T17:30:51.151325995Z","published":"2026-02-14T15:09:45.689Z","related":["SUSE-SU-2026:0962-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:20667-1","SUSE-SU-2026:20720-1","SUSE-SU-2026:20838-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","SUSE-SU-2026:20931-1","openSUSE-SU-2026:20416-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71200.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3009738a855cf938bbfc9078bec725031ae623a4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/36be050f21dea7a3a76dff5a031da6274e8ee468"},{"type":"WEB","url":"https://git.kernel.org/stable/c/59b8a1ca6df4db2ca250e9eeab74e2b0068d69e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de0ad7156036a50982bcb75a080e4af284502be2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f2677d6e2bbc5ba2030825522d2afd0542b038a3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71200.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71200"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c6f361cba51c536e7a6af31973c6a4e5d7e4e2e4"},{"fixed":"59b8a1ca6df4db2ca250e9eeab74e2b0068d69e9"},{"fixed":"f2677d6e2bbc5ba2030825522d2afd0542b038a3"},{"fixed":"de0ad7156036a50982bcb75a080e4af284502be2"},{"fixed":"36be050f21dea7a3a76dff5a031da6274e8ee468"},{"fixed":"3009738a855cf938bbfc9078bec725031ae623a4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-71200.json"}}],"schema_version":"1.7.5"}