CVE-2026-45684
OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite user buffers
CVSS Score
4.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-126 CWE-787 |
| Vendor | open-telemetry |
| Product | opentelemetry-ebpf-instrumentation |
| Published | Jun 2, 2026 |
| Last Updated | Jun 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
open-telemetry / opentelemetry-ebpf-instrumentation
>= 0.7.0, < 0.9.0