TI-2026-33426 Aliases CVE-2026-45684 GHSA-vvmg-8mjr-g6q3

OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite user buffers

MEDIUM 57CWE-126Published 2026-06-02 · Updated 2026-06-02

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.7.0 to before version 0.9.0, OBI's log enricher mishandles writev buffers by reading only the first iovec entry but using the total iov_iter.count as the copy length. When log injection is enabled, a crafted multi-segment writev call can make OBI read and overwrite memory beyond the first segment. 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 0.00172 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	0.7.0 to before 0.9.0	0.9.0	Patch available	CNA
—	go.opentelemetry.io/obi (Go)	0.7.0 to before 0.9.0	0.9.0	Patch available	GHSA-vvmg-8mjr-g6q3

opentelemetry-ebpf-instrumentation Vendoropen-telemetry Affected 0.7.0 to before 0.9.0 Fixed in 0.9.0 Patch available CNA
go.opentelemetry.io/obi (Go) Vendor— Affected 0.7.0 to before 0.9.0 Fixed in 0.9.0 Patch available GHSA-vvmg-8mjr-g6q3

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:opentelemetry:ebpf_instrumentation::::::go::*	0.7.0 to before 0.9.0	Vulnerable	open-telemetry

cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:* Versions 0.7.0 to before 0.9.0 Vulnerable ·open-telemetry

Remediation

Fix · CNA opentelemetry-ebpf-instrumentation (open-telemetry) Fixed in 0.9.0
Fix · GHSA-vvmg-8mjr-g6q3 go.opentelemetry.io/obi (Go) Fixed in 0.9.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-45684
2026-10-03 Alias added: GHSA-vvmg-8mjr-g6q3

References

Exploit 1

https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-vvmg-8mjr-g6q3

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-45684

Other 2

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

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences