CVE-2026-45684 PUBLISHED

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

Assigner: GitHub_M
Reserved: 12.05.2026 Published: 02.06.2026 Updated: 02.06.2026

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.

Metrics

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

Product Status

Vendor open-telemetry
Product opentelemetry-ebpf-instrumentation
Versions
  • Version >= 0.7.0, < 0.9.0 is affected

References

Problem Types

  • CWE-126: Buffer Over-read CWE
  • CWE-787: Out-of-bounds Write CWE