CVE-2026-98210

mmc: mxcmmc: cancel data work and watchdog on remove

State: Published
Severity: Not scored
Published: Oct 6, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f6ad0a481342223b2e7ae9f55b154e14f1391ada to before 740f595f8ad678cb4d79f13edd12851df2492bddAffected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before d3641afe6ee76d852834a34ef0669eefced32752Affected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before 314966b490323bdcfd3162a1398b00e587e0ced4Affected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before ae10838a7cdf0e54caa9d0a4f488704fd04e7f01Affected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before a1ff367e0dc961d73707add508a95df5c3509bd1Affected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before 23383e0578b58ba2dc0730cf9f7806bd66bf859aAffected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before e2948c4232209e87c861a680f20f1e3cf8a57fecAffected f6ad0a481342223b2e7ae9f55b154e14f1391ada to before d3a421c82412344022982d5b91ba23194a0a6f29Affected
LinuxLinux	3.7Affected before 3.7Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.54 through 6.18.Not affected 7.2.8 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

f6ad0a481342223b2e7ae9f55b154e14f1391ada to before 740f595f8ad678cb4d79f13edd12851df2492bddAffected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before d3641afe6ee76d852834a34ef0669eefced32752Affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before 314966b490323bdcfd3162a1398b00e587e0ced4Affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before ae10838a7cdf0e54caa9d0a4f488704fd04e7f01Affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before a1ff367e0dc961d73707add508a95df5c3509bd1Affected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before 23383e0578b58ba2dc0730cf9f7806bd66bf859aAffected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before e2948c4232209e87c861a680f20f1e3cf8a57fecAffected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to before d3a421c82412344022982d5b91ba23194a0a6f29Affected

LinuxLinux

3.7Affected
before 3.7Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.54 through 6.18.*Not affected
7.2.8 through 7.2.*Not affected
7.3 and laterNot affected

References

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