CVE-2026-68465 mmc: sdhci-esdhc-imx: fix esdhc_change_pinstate() to allow default state restore
A logic error in the Linux kernel's SDHCI driver prevents default pin state restoration, potentially causing denial of service for specific hardware configurations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68465?
CVE-2026-68465 is a denial of service vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
mmc: sdhci-esdhc-imx: fix esdhc_change_pinstate() to allow default state restore
esdhc_change_pinstate() checks for pins_100mhz and pins_200mhz at the top of the function and returns -EINVAL if either is not defined. This prevents the default case from ever being reached, which means devices with a sleep pinctrl state but without high-speed pin states (100mhz/ 200mhz) can never restore their default pin configuration.
Move the IS_ERR checks for pins_100mhz and pins_200mhz into their respective switch cases.
Which versions are affected by CVE-2026-68465?
How do I fix CVE-2026-68465?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-68465 being exploited?
There is no known exploitation of CVE-2026-68465 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68465, DEBIAN-CVE-2026-68465, GHSA-6w8x-qp9f-74pq, UBUNTU-CVE-2026-68465.