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Vulnerability record · CVE-2026-45684 · published 2 June 2026

CVE-2026-45684: Opentelemetry ebpf instrumentation out-of-bounds write vulnerability

Opentelemetry · Ebpf Instrumentation

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.

5.3 CVSS 3.1 Medium EPSS 0.18% · top 93.2% CWE-126 · CWE-126CWE-787 · Out-of-bounds write
5.3CVSS 3.1 base score
0.18%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. 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.

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

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-vvmg-8mjr-g6q3 ExploitVendor Advisory
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-vvmg-8mjr-g6q3 ExploitVendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2026-45684), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.