CVE-2026-45681: Opentelemetry Ebpf Instrumentation

Medium severity, CVSS 5.9. EPSS: 0.3% chance of exploitation in the next 30 days.

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

• Opentelemetry Ebpf Instrumentation: before 0.9.0 (fixed in 0.9.0)

Published 2026-06-02. Last modified 2026-07-22.