eBPF Instrumentation Vulnerability in OpenTelemetry
CVE-2026-45681

5.9MEDIUM

Key Information:

Vendor

Open-telemetry

Status
Opentelemetry-ebpf-instrumentation
Vendor
CVE Published:
2 June 2026

What is CVE-2026-45681?

The OpenTelemetry eBPF Instrumentation prior to version 0.9.0 has a vulnerability in its per-CPU message-buffer fallback mechanism. This issue arises from the utilization of a 256-byte backup buffer that inadequately manages the original payload size, which can reach up to 8KB. In instances of CPU mismatches, it can result in unintended memory reads beyond the fallback buffer, potentially leading to the exposure of sensitive adjacent memory contents in telemetry data. The vulnerability has been addressed in version 0.9.0.

Affected Version(s)

opentelemetry-ebpf-instrumentation < 0.9.0

References

https://github.com/open-telemetry/opentelemetry-ebpf-inst...
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https://github.com/open-telemetry/opentelemetry-ebpf-inst...
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CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.