CVE-2026-45681

OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size

Published Jun 2, 2026 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-r6c9-g6q5-qrf9 OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size
History
Type Values Removed Values Added
First Time appeared Opentelemetry ebpf Instrumentation
CPEs cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:*
Vendors & Products Opentelemetry ebpf Instrumentation
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Opentelemetry
Opentelemetry opentelemetry-ebpf-instrumentation
Vendors & Products Opentelemetry
Opentelemetry opentelemetry-ebpf-instrumentation
Type Values Removed Values Added
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.
Title OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size
Weaknesses CWE-125
CWE-130
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 2, 2026, 6:05 PM
Reserved
May 12, 2026, 9:59 PM
Status
Analyzed
Published
Jun 2, 2026, 4:16 PM
Modified
Jul 22, 2026, 7:10 PM