CVE-2026-45681
MEDIUMOpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size
Title source: cnaDescription
OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the per-CPU message-buffer fallback path uses a 256-byte backup buffer but preserves the original payload size, which can be up to 8KB. If a CPU mismatch occurs, OBI can read beyond the fallback buffer and leak adjacent memory into telemetry. This issue has been patched in version 0.9.0.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9
X_Refsource_Misc x_refsource_misc
https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0
Scores
CVSS v3
5.9
EPSS
0.0024
EPSS Percentile
14.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-125
CWE-130
Status
published
Products (3)
go.opentelemetry.io/obi
0 - 0.9.0Go
open-telemetry/opentelemetry-ebpf-instrumentation
< 0.9.0
opentelemetry/ebpf_instrumentation
< 0.9.0
Published
Jun 02, 2026
Tracked Since
Jun 02, 2026