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Vulnerability record · CVE-2026-45681 · published 2 June 2026

CVE-2026-45681: Opentelemetry ebpf instrumentation out-of-bounds read vulnerability

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.

5.9 CVSS 3.1 Medium EPSS 0.38% · top 70.8% CWE-125 · Out-of-bounds readCWE-130 · CWE-130
5.9CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
22 Jul 2026Last modified by NVD

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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0 ProductRelease Notes
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9 ExploitVendor Advisory
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9 ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2026-45685Opentelemetry ebpf instrumentation improper input validation vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.1.0 to before version 0.9.0, mal…EPSS 0.63%7.5CVE-2026-45686Opentelemetry ebpf instrumentation integer overflow vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.7.0 to before version 0.9.0, a r…EPSS 0.52%7.5CVE-2026-45678Opentelemetry ebpf instrumentation improper input validation vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the Postgres protocol p…EPSS 0.52%7.5CVE-2026-45680Opentelemetry ebpf instrumentation uncontrolled resource consumption vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, OBI replays BPF probe h…EPSS 0.48%6.5CVE-2026-45679Opentelemetry ebpf instrumentation sensitive information in log file vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, OBI exports raw Redis e…EPSS 0.30%5.5CVE-2026-45676Opentelemetry ebpf instrumentation improper input validation vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, OBI's replacement ELF p…EPSS 0.17%5.5CVE-2026-45682Opentelemetry ebpf instrumentation memory leak vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the custom CappedConcur…EPSS 0.17%5.3CVE-2026-45684Opentelemetry ebpf instrumentation out-of-bounds write vulnerabilityOpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.7.0 to before version 0.9.0, OBI…EPSS 0.18%

Source: NIST National Vulnerability Database (record CVE-2026-45681), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.