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CVE-2026-98210

Unknown

Last modified

CVE-2026-98210 is a vulnerability of currently unknown severity. 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().

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < 740f595f8ad678cb4d79f13edd12851df2492bdd; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < d3641afe6ee76d852834a34ef0669eefced32752; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < 314966b490323bdcfd3162a1398b00e587e0ced4; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < ae10838a7cdf0e54caa9d0a4f488704fd04e7f01; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < a1ff367e0dc961d73707add508a95df5c3509bd1; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < 23383e0578b58ba2dc0730cf9f7806bd66bf859a; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < e2948c4232209e87c861a680f20f1e3cf8a57fec; >= f6ad0a481342223b2e7ae9f55b154e14f1391ada, < d3a421c82412344022982d5b91ba23194a0a6f29
LinuxLinux3.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98210?
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.
How severe is CVE-2026-98210?
Severity scoring for CVE-2026-98210 is pending analysis.
How do I fix CVE-2026-98210?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST