CVE-2026-45684: CWE-126: Buffer Over-read in open-telemetry 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.
AI Analysis
Technical Summary
OpenTelemetry eBPF Instrumentation (opentelemetry-ebpf-instrumentation) versions from 0.7.0 to before 0.9.0 contain a buffer over-read vulnerability (CWE-126) in the log enricher component. The flaw occurs because the code reads only the first iovec entry of a writev call but uses the total length from iov_iter.count for copying, leading to reading and overwriting memory beyond the intended buffer when log injection is enabled. This vulnerability was addressed and fixed in version 0.9.0.
Potential Impact
Successful exploitation can lead to reading and overwriting memory beyond the intended buffer boundaries, potentially causing information disclosure, data corruption, or application instability. The CVSS score of 4.9 reflects a medium severity with local attack vector, high attack complexity, no privileges required, and impacts on confidentiality, integrity, and availability at a low level. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade to 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-2026-45684: CWE-126: Buffer Over-read in open-telemetry opentelemetry-ebpf-instrumentation
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 v3.1
Score 4.9medium
Affected software
pkg:github/open-telemetry/opentelemetry-ebpf-instrumentationRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenTelemetry eBPF Instrumentation (opentelemetry-ebpf-instrumentation) versions from 0.7.0 to before 0.9.0 contain a buffer over-read vulnerability (CWE-126) in the log enricher component. The flaw occurs because the code reads only the first iovec entry of a writev call but uses the total length from iov_iter.count for copying, leading to reading and overwriting memory beyond the intended buffer when log injection is enabled. This vulnerability was addressed and fixed in version 0.9.0.
Potential Impact
Successful exploitation can lead to reading and overwriting memory beyond the intended buffer boundaries, potentially causing information disclosure, data corruption, or application instability. The CVSS score of 4.9 reflects a medium severity with local attack vector, high attack complexity, no privileges required, and impacts on confidentiality, integrity, and availability at a low level. There are no known exploits in the wild.
Mitigation Recommendations
Upgrade to 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: 6a1efb6ae29bf47b50db3b44
Added to database: 06/02/2026, 15:48:58 UTC
Last enriched: 06/02/2026, 16:04:31 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 47
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