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

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Summary

CVECVE-2026-45684
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-02 16:16:43 UTC
Updated2026-06-02 17:16:34 UTC
DescriptionOpenTelemetry 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.

Risk And Classification

Primary CVSS: v3.1 4.9 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Problem Types: CWE-126 | CWE-787 | CWE-126 CWE-126: Buffer Over-read | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.9MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED4.9MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-telemetry Opentelemetry-ebpf-instrumentation affected >= 0.7.0, < 0.9.0 Not specified

References

ReferenceSourceLinkTags
github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/ad... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/ta... [email protected] github.com
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