CVE-2026-97920 Linux CVE debrief

Who should care

Linux kernel developers, system administrators, and security teams should assess exposure to this vulnerability and verify Linux kernel versions. They should review system configurations for potential vulnerability and ensure that compensating controls are in place. They should also monitor system logs for potential exploitation attempts and confirm whether affected product deployments exist in managed environments.

Why it matters

Linux kernel vulnerability CVE-2026-97920, resolved issue involving tracing histogram stats allocation failure, requires verification of Linux kernel versions and system configurations.

• Verify Linux kernel versions to assess exposure
• Review system configurations for potential vulnerability

Technical summary

The Linux kernel vulnerability involves tracing histogram stats allocation failure. When print_entries() returns an error code, it overwrites the entry count needed for cleanup. This leads to an out-of-bounds read when tracing_map_destroy_sort_entries() is called with a large unsigned int value. The bug can be triggered by reading the hist file of a trigger with a .percent value, with the allocation forced to fail. The vulnerability was made public on September 25, 2026, and there have been no changes since then. Linux kernel developers, system administrators, and security teams should verify Linux kernel versions and assess exposure to this vulnerability.

Defensive priority

Verify Linux kernel versions and assess exposure to this vulnerability. Review system configurations and ensure that compensating controls are in place.

Recommended defensive actions

• Verify Linux kernel versions and assess exposure to this vulnerability
• Review system configurations and ensure that compensating controls are in place
• 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 issue is resolved in the Linux kernel. Official CVE Program record and NIST NVD detail page provide source-specific vulnerability assessment. The vulnerability was made public on September 25, 2026, and there have been no changes since then. Linux kernel developers, system administrators, and security teams should verify Linux kernel versions and assess exposure to this vulnerability.

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.