PT-2026-41786 · Unknown · @Opentelemetry/Instrumentation

Mralias · Published 2026-05-18 · Updated 2026-06-25 · CVE-2026-45681

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenTelemetry eBPF Instrumentation versions prior to 0.9.0

Description The per-CPU message-buffer fallback path uses a 256-byte backup buffer but preserves the original payload size, which can reach up to 8KB. If a CPU mismatch occurs between producer and consumer contexts, the system can read beyond the fallback buffer, leading to a memory leak of adjacent data into telemetry. This issue specifically affects the HTTP tracing path when context propagation is enabled, the tpinjector sock msg path is active, and HTTP large-buffer capture is configured with a non-zero size. Technical details involve the fallback buf in msg buffer t and the use of real size to read payload data from u buf, which causes an over-read when the smaller fallback buffer is utilized.

Recommendations Update to version 0.9.0.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

CWE-130

Related Identifiers

CVE-2026-45681

GHSA-R6C9-G6Q5-QRF9

GO-2026-5610

Affected Products

@Opentelemetry/Instrumentation

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45681.json · Exploit
• 🔥 https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-r6c9-g6q5-qrf9 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-45681 · Security Note
• https://osv.dev/vulnerability/GHSA-r6c9-g6q5-qrf9 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-5610 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-45681 · Vendor Advisory
• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0 · Note
• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation · Note