medium5.9
CVE-2026-45681
OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | go.opentelemetry.io/obi | < 0.9.0 | 0.9.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Opentelemetry | Ebpf Instrumentation | before 0.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-r6c9-g6q5-qrf9
- https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9
- https://nvd.nist.gov/vuln/detail/CVE-2026-45681
- https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0