CVE-2026-45681: CWE-125: Out-of-bounds Read in open-telemetry opentelemetry-ebpf-instrumentation
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.
AI Analysis
Technical Summary
OpenTelemetry eBPF Instrumentation versions before 0.9.0 use a 256-byte backup buffer for per-CPU message fallback, but preserve the original payload size which can be as large as 8KB. If a CPU mismatch occurs, this leads to an out-of-bounds read beyond the fallback buffer, causing leakage of adjacent memory into telemetry data. This vulnerability is tracked as CVE-2026-45681 and is classified under CWE-125 (Out-of-bounds Read) and CWE-130. The issue has been fixed in version 0.9.0.
Potential Impact
The vulnerability allows reading memory beyond the intended buffer, which can lead to leakage of adjacent memory contents into telemetry data. This could expose sensitive information contained in memory. There is no indication of integrity or availability impact. The CVSS score is 5.9 (medium severity), reflecting a network attack vector with high complexity and no privileges required.
Mitigation Recommendations
Upgrade to open-telemetry opentelemetry-ebpf-instrumentation version 0.9.0 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated in the available data.
CVE-2026-45681: CWE-125: Out-of-bounds Read in open-telemetry opentelemetry-ebpf-instrumentation
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.
CVSS v3.1
Score 5.9medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenTelemetry eBPF Instrumentation versions before 0.9.0 use a 256-byte backup buffer for per-CPU message fallback, but preserve the original payload size which can be as large as 8KB. If a CPU mismatch occurs, this leads to an out-of-bounds read beyond the fallback buffer, causing leakage of adjacent memory into telemetry data. This vulnerability is tracked as CVE-2026-45681 and is classified under CWE-125 (Out-of-bounds Read) and CWE-130. The issue has been fixed in version 0.9.0.
Potential Impact
The vulnerability allows reading memory beyond the intended buffer, which can lead to leakage of adjacent memory contents into telemetry data. This could expose sensitive information contained in memory. There is no indication of integrity or availability impact. The CVSS score is 5.9 (medium severity), reflecting a network attack vector with high complexity and no privileges required.
Mitigation Recommendations
Upgrade to open-telemetry opentelemetry-ebpf-instrumentation version 0.9.0 or later, where this vulnerability has been patched. No other mitigation or temporary workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-12T21:59:25.667Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1efb6ae29bf47b50db3b38
Added to database: 6/2/2026, 3:48:58 PM
Last enriched: 6/2/2026, 4:04:44 PM
Last updated: 6/3/2026, 5:02:11 AM
Views: 8
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