CVE-2026-92518 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and prioritize patching or verification to prevent potential system instability and security issues. The vulnerability requires immediate attention from operators, platforms, vulnerability-management teams, and security teams to ensure system security and stability.

Why it matters

CVE-2026-92518 is a Linux kernel vulnerability that could lead to kernel stack corruption when CONFIG_CFI_CLANG is enabled. Linux kernel maintainers and users should assess exposure and prioritize patching or verification to prevent potential system instability and security issues.

• Potential kernel stack corruption on affected Linux systems
• Need for verification of system exposure and patching status
• Potential impact on system stability and security

Technical summary

The Linux kernel vulnerability (CVE-2026-92518) occurs when CONFIG_CFI_CLANG is enabled, causing kernel stack corruption due to incorrect tailcall jump offset calculation. This issue has been resolved in the kernel, and Linux kernel maintainers and users should assess exposure and prioritize patching or verification to prevent potential system instability and security issues. The vulnerability affects Linux kernel deployments and requires immediate attention to ensure system security and stability. Affected systems should be patched or verified to prevent potential exploitation.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize patching or verification.

Recommended defensive actions

• Assess exposure of Linux kernel deployments to this vulnerability
• Prioritize patching or verification for affected systems
• Monitor system logs for potential exploitation attempts
• 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 vulnerability, but additional information on affected systems and exploitation is limited. Defenders should verify Linux kernel deployments for potential exposure and review system logs for exploitation attempts. The vulnerability has been resolved in the kernel, but further verification is necessary to ensure system security.

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.