CVE-2026-93814 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel configurations, particularly those using SPI controllers in target mode, should assess exposure and apply patches to prevent potential system instability during suspend and resume operations.

Why it matters

Defenders should prioritize verifying and applying patches for Linux kernel SPI controller configurations to prevent potential system instability during suspend and resume operations. The vulnerability's impact is limited to SPI controller operations in target mode, and specific version details and exploit information are not provided.

• Potential system hang or failure to resume cleanly during suspend and resume operations
• Need to verify and apply patches for Linux kernel SPI controller configurations
• Importance of monitoring system logs for signs of SPI controller instability

Technical summary

The Linux kernel vulnerability occurs when an SPI controller in target mode has an active transfer during system suspend. The fix ensures that any ongoing transfer is aborted before the controller is suspended, preventing potential system instability. This issue affects Linux kernel configurations using SPI controllers in target mode. Defenders should prioritize verifying and applying patches for Linux kernel SPI controller configurations to prevent potential system instability during suspend and resume operations.

Defensive priority

Defenders should prioritize verifying and applying patches for Linux kernel SPI controller configurations to prevent potential system instability during suspend and resume operations.

Recommended defensive actions

• Verify Linux kernel versions and SPI controller configurations for potential exposure
• Apply patches or updates provided by the Linux kernel maintainers
• Monitor system logs for signs of SPI controller instability during suspend and 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 CVE record and NVD entry provide details on the Linux kernel vulnerability, its impact on SPI controller operations during system suspend, and the fix involving the target_abort callback. However, specific version details and exploit information are not provided.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.