CVE-2026-68464

Summary

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

mmc: sdhci-esdhc-imx: disable irq during suspend to fix unhandled interrupt

When using WIFI out-of-band wakeup, an "irq xxx: nobody cared" warning occurs. This happens because the usdhc interrupt is not disabled during system suspend when device_may_wakeup() returns false.

The sequence of events leading to this issue:

  1. System enters suspend without disabling usdhc interrupt (because device_may_wakeup() returns false for usdhc device)
  2. WIFI out-of-band wakeup triggers system resume via GPIO interrupt
  3. WIFI sends a Card interrupt before usdhc has fully resumed
  4. usdhc is still in runtime suspend state and cannot handle the interrupt properly
  5. The unhandled interrupt triggers "nobody cared" warning

Fix this by unconditionally disabling the usdhc interrupt during suspend and re-enabling it during resume, regardless of the wakeup capability. This ensures no interrupts are processed during the suspend/resume transition.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux676a83855614635af3bf31ad3f8fec4031f81354 < 4f96903e2fd228aa96013372402d650f6dbe5cb3affected
LinuxLinux676a83855614635af3bf31ad3f8fec4031f81354 < 9bf4ee05a1109d889de9151ee78bd80293923f70affected
LinuxLinux676a83855614635af3bf31ad3f8fec4031f81354 < 9d87eaf985cef9581b6ed99b461b38e8cd666480affected
LinuxLinux6.16affected
LinuxLinux0 < 6.16unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References