OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite user buffers — CVE-2026-45684

Summary

### Summary 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. ### Details In…

Product

go: go.opentelemetry.io/obi

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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