# CVE-2026-45681

## Summary

- **CVE ID:** CVE-2026-45681
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-125, CWE-130
- **Published:** Jun 2, 2026
- **Last Modified:** Jun 2, 2026

## Description

OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the per-CPU message-buffer fallback path uses a 256-byte backup buffer but preserves the original payload size, which can be up to 8KB. If a CPU mismatch occurs, OBI can read beyond the fallback buffer and leak adjacent memory into telemetry. This issue has been patched in version 0.9.0.

## Affected Products

- open-telemetry — opentelemetry-ebpf-instrumentation (< 0.9.0)

## References

- [CNA](https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9)
- [CNA](https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.29%
- **EPSS Percentile:** 21.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._