OpenTelemetry eBPF Instrumentation: Java TLS ioctl kprobe allows kernel memory disclosure
Priority MEDIUM 51CWE-127Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the Java TLS ioctl probe reads user-controlled ioctl pointers with bpf_probe_read instead of bpf_probe_read_user. An instrumented local process can therefore point OBI at kernel memory and cause that memory to be copied into telemetry. This issue has been patched in version 0.9.0.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00174 6th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed opentelemetry-ebpf-instrumentation (open-telemetry): 0.9.0go.opentelemetry.io/obi (Go): 0.9.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| open-telemetry | opentelemetry-ebpf-instrumentation | before 0.9.0 | 0.9.0 | Patch available | CNA |
| — | go.opentelemetry.io/obi (Go) | before 0.9.0 | 0.9.0 | Patch available | GHSA-fjq3-ffvr-vm46 |
- opentelemetry-ebpf-instrumentation Vendoropen-telemetry Affected before 0.9.0 Fixed in 0.9.0 Patch available CNA
- go.opentelemetry.io/obi (Go) Vendor— Affected before 0.9.0 Fixed in 0.9.0 Patch available GHSA-fjq3-ffvr-vm46
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:* | before 0.9.0 | Vulnerable | open-telemetry |
- cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:* Versions before 0.9.0 Vulnerable ·open-telemetry
Remediation
- Fix · CNA opentelemetry-ebpf-instrumentation (open-telemetry) Fixed in 0.9.0
- Fix · GHSA-fjq3-ffvr-vm46 go.opentelemetry.io/obi (Go) Fixed in 0.9.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45683
- 2026-10-03 Alias added: GHSA-fjq3-ffvr-vm46
References
More open-telemetry Ebpf Instrumentation vulnerabilities
- TI-2026-33428 OpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI CVSS 3.1HIGH 7.5
- TI-2026-33427 OpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages CVSS 3.1HIGH 7.5
- TI-2026-33420 OpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads CVSS 3.1HIGH 7.5
- TI-2026-33421 OpenTelemetry eBPF Instrumentation: Redis error text is exported in span status messages CVSS 3.1MEDIUM 6.5
- TI-2026-33422 OpenTelemetry eBPF Instrumentation: Unbounded BPF internal metrics replay can exhaust CPU CVSS 3.1HIGH 7.5
- TI-2026-33423 OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size CVSS 3.1MEDIUM 5.9
Sources
- CVE-2026-45683 · CVE Program
- CVE-2026-45683 · NVD
- FIRST EPSS
- GHSA-fjq3-ffvr-vm46 · GitHub Advisory Database · CC BY 4.0
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