Integer overflow in Open-Telemetry Opentelemetry-Ebpf-Instrumentation
CVE-2026-45686
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (42.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.002
Affected products
- Open-Telemetry Opentelemetry-Ebpf-Instrumentation — versions >= 0.7.0, < 0.9.0
- Opentelemetry Ebpf Instrumentation
Weakness classification (CWE)
References
- github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisorie… (Exploit, Vendor Advisory)
- github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-45686?
- CVE-2026-45686 is a high-severity vulnerability in Open-Telemetry Opentelemetry-Ebpf-Instrumentation, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-06-02.
- How severe is CVE-2026-45686?
- High severity. CVSS v3 base score is 7.5 out of 10.