CVE-2026-80655 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel systems, particularly those using affected versions, should assess exposure and prioritize patching. This includes operators of Linux-based infrastructure, security teams managing vulnerability risk, and platform administrators responsible for maintaining up-to-date systems. Linux kernel maintainers and vendors may also need to review and apply patches to affected versions.

Why it matters

A race condition vulnerability in the Linux kernel's soc: xilinx event registration can lead to system crashes if exploited. Defenders should prioritize verifying and applying patches for affected versions.

• Potential system crashes due to NULL pointer dereference
• Need to verify and apply patches for affected Linux kernel versions
• Monitoring system logs for potential exploitation attempts

Technical summary

The Linux kernel's soc: xilinx event registration is vulnerable to a race condition. The zynqmp_power driver registers handlers for suspend and subsystem restart events, but the work structures used by these handlers are allocated and initialized after registration. This creates a race window where an event triggered immediately after registration but before allocation can cause a crash. The vulnerability can be mitigated by verifying and applying patches for affected Linux kernel versions. Defenders should prioritize patching for affected systems to prevent potential system crashes.

Defensive priority

Defenders should prioritize verifying and applying patches for Linux kernel versions affected by this vulnerability, particularly those versions prior to the fixed versions.

Recommended defensive actions

• Verify Linux kernel versions and apply patches for affected versions
• Review system logs for potential exploitation attempts
• Implement monitoring for unusual system behavior
• Conduct a thorough review of system configurations and patch levels
• Inventory affected systems and prioritize patching based on risk
• Monitor for indicators of compromise related to this vulnerability
• Engage with Linux kernel maintainers or vendors for additional guidance on mitigation

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and references to source code changes. The Linux kernel's soc: xilinx event registration is vulnerable to a race condition. The zynqmp_power driver registers handlers for suspend and subsystem restart events, but the work structures used by these handlers are allocated and initialized after registration. This creates a race window where an event triggered immediately after registration but before allocation can cause a A

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.