CVE-2026-45681
OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size
MEDIUM 5.9EPSS 0.3%
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
- open-telemetry · opentelemetry-ebpf-instrumentation
- CVSS v3.1 GITHUB
- 5.9 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.29% chance of exploitation in the next 30 days, 20th percentile
- Published
- 2026-06-02
Proof-of-concept exploits (1)
Security advisories
- open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9
- open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0