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

Quick assessment

Affected
open-telemetry opentelemetry-ebpf-instrumentation
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenTelemetry eBPF Instrumentation是OpenTelemetry开源的一个基于eBPF的轻量级遥测数据采集工具。 OpenTelemetry eBPF Instrumentation 0.7.0版本至0.9.0之前版本存在输入验证错误漏洞，该漏洞源于memcached文本协议解析器中存在远程可达的整数溢出，可能导致崩溃OBI进程并造成拒绝服务。

CVSS 7.5 · High EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-telemetry opentelemetry-ebpf-instrumentation >= 0.7.0, < 0.9.0 affected
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I. Basic Information for CVE-2026-45686

Vulnerability Information
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Vulnerability Title
OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
OpenTelemetry eBPF Instrumentation 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenTelemetry eBPF Instrumentation是OpenTelemetry开源的一个基于eBPF的轻量级遥测数据采集工具。 OpenTelemetry eBPF Instrumentation 0.7.0版本至0.9.0之前版本存在输入验证错误漏洞，该漏洞源于memcached文本协议解析器中存在远程可达的整数溢出，可能导致崩溃OBI进程并造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-telemetry opentelemetry-ebpf-instrumentation >= 0.7.0, < 0.9.0 -

II. Public POCs for CVE-2026-45686

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8855 chars
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III. Intelligence Information for CVE-2026-45686

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Vendor Advisories for CVE-2026-45686 (1)

Vendor Pages for CVE-2026-45686 (1)

Same Patch Batch · open-telemetry · 2026-06-02 · 10 CVEs total

CVE-2026-45685 7.5 HIGH OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages
CVE-2026-45678 7.5 HIGH OpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads
CVE-2026-45679 6.5 MEDIUM OpenTelemetry eBPF Instrumentation: Redis error text is exported in span status messages
CVE-2026-45681 5.9 MEDIUM OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB si
CVE-2026-45680 5.9 MEDIUM OpenTelemetry eBPF Instrumentation: Unbounded BPF internal metrics replay can exhaust CPU
CVE-2026-45676 5.5 MEDIUM OpenTelemetry eBPF Instrumentation: Unsafe fastelf parsing allows malformed ELF to crash a
CVE-2026-45682 5.1 MEDIUM OpenTelemetry eBPF Instrumentation: CappedConcurrentHashMap leaks keys after removals
CVE-2026-45684 4.9 MEDIUM OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite us
CVE-2026-45683 3.8 LOW OpenTelemetry eBPF Instrumentation: Java TLS ioctl kprobe allows kernel memory disclosure

IV. Related Vulnerabilities

Same product: opentelemetry-ebpf-instrumentation
Same vendor: open-telemetry
Same weakness: CWE-190

V. Comments for CVE-2026-45686

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