Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Opentelemetry | Ebpf Instrumentation | < 0.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/taProductRelease Notes
- https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/adExploitVendor Advisory
- https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/adExploitVendor Advisory
FAQ
What is CVE-2026-45681?
CVE-2026-45681 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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...
How severe is CVE-2026-45681?
CVE-2026-45681 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45681?
Check the references section above for vendor advisories and patch information. Affected products include: Opentelemetry Ebpf Instrumentation.