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Linux KernelOperating system · Linux

CVE-2025-71200

MEDIUM · 5.5 CVSS v3.1 Published 2026-02-14
Fix available
A fix is available. Upgrade to 6.1.162 / 6.6.122 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

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

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 6.0, < 6.1.162>= 6.2, < 6.6.122>= 6.7, < 6.12.68>= 6.13, < 6.18.8= 6.19

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.1.162 / 6.6.122 / 6.12.68 or later
Fixed in 6.1.1626.6.1226.12.68
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel version 6.1.162+, 6.6.122+, 6.12.68+, or 6.18.8+ depending on your current branch

  1. Identify current kernel version using 'uname -r'
  2. Plan for system downtime as kernel upgrade requires reboot
  3. Upgrade the Linux kernel to a fixed version: 6.1.162 or later for 6.1.x, 6.6.122 or later for 6.2-6.6.x, 6.12.68 or later for 6.7-6.12.x, or 6.18.8 or later for 6.13-6.18.x
  4. Install the new kernel package using distribution package manager (e.g., apt-get update && apt-get install linux-image-<version>)
  5. Reboot the system to load the fixed kernel
  6. Verify the fix is applied by checking the kernel version with 'uname -r' and confirming the fix commit (3009738a855cf938bbfc9078bec725031ae623a4) is included
Caveat Kernel upgrades may introduce compatibility changes with third-party modules or drivers; ensure all proprietary drivers (GPU, WiFi, etc.) are compatible with the target kernel version before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-71200 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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