CVE-2026-45681 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-45681MEDIUM

open-telemetry opentelemetry-ebpf-instrumentation — OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  H  N  N    5.9   .0029   21.3     —

AFFECTED
  Product                             Versions   Fixed
  opentelemetry-ebpf-instrumentation  < 0.9.0 –  —

TIMELINE
  May 12  Reserved by GitHub_M
  Jun 2   EXPLOIT PUBLISHED — CVE-2026-45681 (open-telemetry opentelemetry-ebpf-instrumentation). Public exploit reference added.
  Jun 2   Published (CNA: GitHub_M)

CWE-125, CWE-130 · CNA: GitHub_M · CVSS v3.1 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 12, 2026	Reserved	Reserved by GitHub_M
June 2, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-45681 (open-telemetry opentelemetry-ebpf-instrumentation). Public exploit reference added.
June 2, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
open-telemetry	opentelemetry-ebpf-instrumentation	—	< 0.9.0	—

Weaknesses

CWE-125 · CWE-130

References (2)

https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0 [Product, Release Notes]
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-45681 at cve.org

Vendors: open-telemetry

Weaknesses: CWE-125 · CWE-130

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-45681 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.