Remote process crash via payload-length overflow
Published Jun 2, 2026 · Updated Jun 2, 2026
Integer overflow in OpenTelemetry eBPF Instrumentation allows remote attackers to crash OBI and interrupt telemetry collection. The memcached request parser accepts an unbounded bytes field, overflows when adding the CRLF length, and passes a negative value to LargeBufferReader.Peek. Affected deployments run 0.7.0 or later before 0.9.0 and observe attacker-influenced memcached text traffic; the panic halts collection until restart.
Summary
What happened
Integer overflow in OpenTelemetry eBPF Instrumentation allows remote attackers to crash OBI and interrupt telemetry collection. The memcached request parser accepts an unbounded bytes field, overflows when adding the CRLF length, and passes a negative value to LargeBufferReader.Peek. Affected deployments run 0.7.0 or later before 0.9.0 and observe attacker-influenced memcached text traffic; the panic halts collection until restart.
The record
- CVE
- CVE-2026-45686
- Published
- Jun 2, 2026
- Updated
- Jun 2, 2026
- Vendor
- OpenTelemetry
- Product
- OpenTelemetry eBPF Instrumentation
- Classifications
- CWE-190, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 2, 2026CVE publishedPublication date reported by the CVE source.
- Jun 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 0.7.0, < 0.9.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Upstream memcached payload-length crash PoCproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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