CVE-2026-45686 PUBLISHED

OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI

Assigner: GitHub_M
Reserved: 13.05.2026 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, a remotely reachable integer overflow in OBI's memcached text protocol parser can crash the OBI process and cause denial of service. When parsing memcached storage commands such as set, add, replace, append, prepend, or cas, OBI accepts extremely large <bytes> values and adds the payload delimiter length without checking for overflow. A crafted request with <bytes> set to math.MaxInt or math.MaxInt-1 causes the computed payload length to wrap negative and triggers a runtime panic in LargeBufferReader.Peek. This issue has been patched in version 0.9.0.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Product Status

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

References

Problem Types

  • CWE-190: Integer Overflow or Wraparound CWE