CVE-2026-68464 Linux CVE debrief

Who should care

Users of Linux kernel with mmc sdhci-esdhc-imx, particularly those with WIFI out-of-band wakeup configurations, should review and apply patches or mitigations. System administrators, security teams, and operators managing Linux kernel deployments are advised to assess potential impact and take appropriate actions to protect against this vulnerability. This may involve coordinating with vendors for patching, implementing compensating controls, or enhancing monitoring and detection capabilities for exposed assets.

Technical summary

The Linux kernel vulnerability causes an unhandled interrupt issue in mmc sdhci-esdhc-imx, leading to a 'nobody cared' warning. The issue arises when WIFI out-of-band wakeup triggers system resume, and the usdhc interrupt is not disabled during system suspend. To fix this, unconditionally disable the usdhc interrupt during suspend and re-enable it during resume, regardless of the wakeup capability.

Defensive priority

Apply patch or update to Linux kernel to fix unhandled interrupt issue in mmc sdhci-esdhc-imx.

Recommended defensive actions

• Apply patch or update to Linux kernel to fix unhandled interrupt issue in mmc sdhci-esdhc-imx
• Disable usdhc interrupt during system suspend
• Re-enable usdhc interrupt during system resume
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The Linux kernel vulnerability causes an unhandled interrupt issue in mmc sdhci-esdhc-imx, leading to a 'nobody cared' warning. This issue arises when WIFI out-of-band wakeup triggers system resume, and the usdhc interrupt is not disabled during system suspend. Evidence is limited to public sources and may not reflect all affected systems or potential variations. Defenders should verify system configurations, patch status, and monitor for related activity.

Official resources