CVE-2026-98919 Linux CVE debrief

Who should care

Linux system administrators and security teams should assess exposure and prioritize verification of affected systems, especially those with Linux kernel versions 6.15 and earlier.

Why it matters

CVE-2026-98919 is a divide-by-zero and overflow vulnerability in the Linux kernel's drm/xe component. Linux system administrators and security teams should assess exposure and prioritize verification of affected systems, especially those with Linux kernel versions 6.15 and earlier. The vulnerability can be triggered if xe_gt_clock_init() failed to recognise the crystal clock or if IDLE_WAIT_TIME reads back as 0. Verification of affected systems is required to prevent potential divide-by-zero and overflow errors.

• Verification of affected systems is required to prevent potential divide-by-zero and overflow errors.
• Linux system administrators and security teams should prioritize patching or mitigating the vulnerability to prevent potential exploitation.
• The vulnerability may cause system crashes or instability if exploited.

Technical summary

The adjust_idledly() function in the Linux kernel's drm/xe component has several corner-case issues, including divide-by-zero and overflow vulnerabilities. These issues can be triggered if xe_gt_clock_init() failed to recognise the crystal clock or if IDLE_WAIT_TIME reads back as 0. The vulnerability can cause system crashes or instability if exploited. Linux system administrators and security teams should assess exposure and prioritize verification of affected systems, especially those with Linux kernel versions 6.15 and earlier. The vulnerability's technical details include the need for

Defensive priority

Linux system administrators and security teams should assess exposure and prioritize verification of affected systems, especially those with Linux kernel versions 6.15 and earlier.

Recommended defensive actions

• Review Linux kernel versions and identify systems that may be affected by CVE-2026-98919
• Verify that systems are running a patched version of the Linux kernel
• Monitor system logs for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description, affected versions, and references to source code changes. Linux system administrators and security teams should verify the vulnerability's impact on their systems, especially those with Linux kernel versions 6.15 and earlier. Verification tasks include reviewing system logs for potential exploitation attempts and checking for patched versions of the Linux kernel. The vulnerability's description and affected scope should be reviewed to plan

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.