{"id":"CVE-2026-45681","summary":"OpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB size","details":"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.","aliases":["GHSA-r6c9-g6q5-qrf9","GO-2026-5610"],"modified":"2026-09-18T18:26:44.260876469Z","published":"2026-06-02T15:25:00.260Z","related":["openSUSE-SU-2026:11803-1","openSUSE-SU-2026:21483-1"],"database_specific":{"cwe_ids":["CWE-125","CWE-130"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45681.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45681.json"},{"type":"ADVISORY","url":"https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45681"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation","events":[{"introduced":"0"},{"fixed":"e92b0c2dd4d88b90d28b7b706eacbac2fabd2623"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.9.0"}]}}],"versions":["v0.8.0","v0.7.1","v0.7.0","v0.6.0","v0.5.0","v0.4.1","v0.4.0","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45681.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}