mmc: via-sdmmc: cancel card-detect work on remove

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Summary

CVECVE-2026-89441
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:24 UTC
Updated2026-09-11 20:19:24 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mmc: via-sdmmc: cancel card-detect work on remove Disabling the device interrupt and freeing the IRQ prevents new card-detect work from being queued, but carddet_work already queued by the handler can still run after via_sd_remove() returns. via_sdc_card_detect() recovers the host through container_of() and dereferences its MMIO base; once remove() returns the host can be freed, so that work would touch freed memory. Cancel carddet_work after freeing the IRQ and before cancelling finish_bh_work, which the card-detect handler can also queue. carddet_work can re-enable the interrupt through via_reset_pcictrl(); mask it again afterwards. This issue was found by an in-house static analysis tool and confirmed by manual code review.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 f7ff3027ef004a331ef911a4886f12bc2e996037 git Not specified
CNA Linux Linux affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 eaca730c6f5e3609df62a0469fb789235a93d276 git Not specified
CNA Linux Linux affected f0bf7f61b8405224bc52fc9a3ccd167a68126e00 57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5 git Not specified
CNA Linux Linux affected 2.6.31 Not specified
CNA Linux Linux unaffected 2.6.31 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f7ff3027ef004a331ef911a4886f12bc2e996037 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eaca730c6f5e3609df62a0469fb789235a93d276 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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