What’s Vulnerable › Vulnerabilities

CVE-2026-99034: mmc: sdhci-sprd: disable runtime PM on remove

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: mmc: sdhci-sprd: disable runtime PM on remove sdhci_sprd_probe() enables runtime PM, while sdhci_sprd_remove() does not perform the corresponding runtime PM cleanup. The probe failure path disables runtime PM before disabling the clocks, but the normal remove path directly disables clocks that are also managed by the runtime PM callbacks. If the device is runtime suspended, those clocks may already be disabled. Resume the device before removal, disable runtime PM and drop the temporary runtime PM reference before disabling the clocks. This issue was found by manual code inspection.

Affected products

• Linux: 4.20 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/03244b8713d044425db5dbee08037ecd79b684f9
• https://git.kernel.org/stable/c/3a1caa886d41d9bcc9a402906336eda34a90d323
• https://git.kernel.org/stable/c/4dce8c272417a564bd8c8d2ea88ef901e5447f22
• https://git.kernel.org/stable/c/605a59639abb9cb63cd7676460461fb0b34756b3
• https://git.kernel.org/stable/c/a0c7facc0fe9ec772cf8bffac2315a8e1311d39a
• https://git.kernel.org/stable/c/cccd175dd2bfbf8c34a1b0f413760d2ce9ff3ac9
• https://git.kernel.org/stable/c/dbad91a31c482063c0a87c90aa83c9001972c6ac
• https://git.kernel.org/stable/c/e1c6c10a6a70a69e29b04fcc1ebe4b9bcbc7a49a

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