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CVE-2026-98211

Linux: mmc: mmci: Fix use-after-free in busy-timeout work

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in7fecf79f31568de161be14911db10d1251617b01Also 432b98c1f5daecf04a33c8e1688d26e7ac221e23, 2b19cf3e50cddaff07b657dae1a8f30f06032852CVE List
Published6 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 7fecf79f31568de161be14911db10d1251617b01LinuxCVE List
  • 432b98c1f5daecf04a33c8e1688d26e7ac221e23LinuxCVE List
  • 2b19cf3e50cddaff07b657dae1a8f30f06032852LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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

mmc: mmci: Fix use-after-free in busy-timeout work

ux500_busy_complete() can queue ux500_busy_timeout_work for an R1b command, but mmci_remove() never cancels it. The work can subsequently dereference the devm-allocated mmci_host after it has been released.

Mask the controller interrupts and disable the delayed work during removal. This drains any queued instance and stops an IRQ handler that is still in progress from queueing the work again once it has been disabled.

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

Text from CVE List

Affected versions 10

  • Linuxaffected: b1a665932dc23cad0b8af2745cd9713f9e930d63 before af6fbf72e899932f330c4e5d0b84d985c922c633CVE List
  • Linuxaffected: b1a665932dc23cad0b8af2745cd9713f9e930d63 before 7fecf79f31568de161be14911db10d1251617b01CVE List
  • Linuxaffected: b1a665932dc23cad0b8af2745cd9713f9e930d63 before 432b98c1f5daecf04a33c8e1688d26e7ac221e23CVE List
  • Linuxaffected: b1a665932dc23cad0b8af2745cd9713f9e930d63 before 2b19cf3e50cddaff07b657dae1a8f30f06032852CVE List
  • Linuxaffected: 6.5CVE List
  • Linuxunaffected: all versions before 6.5CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.54 through 6.18.*CVE List
  • Linuxunaffected: 7.2.8 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 4