CVE-2026-45684

Description

OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite user buffers

Overview

State

—

Assigner (CNA)

—

CVSS severity

medium

CVSS score

4.9 / 10

CVSS vector

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

Effective score

4.9 / 10 MEDIUM source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-45684

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-33957

Assigner

GitHub_M

Published

Jun 2, 2026, 3:25:32 PM

Updated

Jun 2, 2026, 3:55:27 PM

EUVD base score (CVSS 3.1)

4.9 / 10
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EUVD-reported EPSS

0.1700

Vendors

open-telemetry

Products

opentelemetry-ebpf-instrumentation (0.7.0, < 0.9.0)

Aliases

GHSA-vvmg-8mjr-g6q3

ENISA description: OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.7.0 to before version 0.9.0, OBI's log enricher mishandles writev buffers by reading only the first iovec entry but using the total iov_iter.count as the copy length. When log injection is enabled, a crafted multi-segment writev call can make OBI read and overwrite memory beyond the first segment. This issue has been patched in version 0.9.0.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (5)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://www.first.org/epss/ tenable:www.first.org
• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0 tenable:github.com
• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-vvmg-8mjr-g6q3 tenable:github.com
• https://nvd.nist.gov/vuln/detail/CVE-2026-45684 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-45684 tenable:www.cve.org

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