CVE-2026-98210

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

mmc: mxcmmc: cancel data work and watchdog on remove

mxcmci_remove() frees the host through the devm tail, but neither it nor

mmc_remove_host() drains the driver's own asynchronous state.

host->watchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(),

is deleted only by the DMA- and IRQ-complete paths, which the remove path

does not explicitly drain; it can therefore fire after the host is freed

and dereference it in mxcmci_watchdog(). host->datawork, armed from the

IRQ handler on the PIO path, is not cancelled by the remove path either.

Free the devm-registered IRQ, then cancel datawork and delete the watchdog

in mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first

keeps a trailing handler from re-arming datawork between the cancel and

the host free. Both callbacks are non-self-rearming.

This issue was found by an in-house static analysis tool.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References