OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI — CVE-2026-45686

Summary

### Summary 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`…

Product

go: go.opentelemetry.io/obi

What to do

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

• Prioritize patching or mitigation immediately (treat as actively risky).
• 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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