CVE-2026-45681: OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard

Q: How do I fix CVE-2026-45681?

ebpf instrumentation: upgrade to 0.9.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-45681 being exploited?

CVE-2026-45681 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-45681 affect?

CVE-2026-45681 affects ebpf instrumentation. Severity is medium (CVSS 5.9). 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, wh

Q: How urgent is CVE-2026-45681?

Priority 36/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.9REMOTEUPGRADE

CVE-2026-45681 is a medium-severity flaw (CVSS 5.9) affecting ebpf instrumentation. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-125, CWE-130
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): GitHub, Inc. · Vendor: opentelemetry

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 16:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

opentelemetry ebpf instrumentation UPGRADE

Affected: < 0.9.0

Fixed in: 0.9.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ebpf-instrumentation || rpm -q ebpf-instrumentation || ebpf-instrumentation --version

2. UPGRADE to 0.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ebpf-instrumentation

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ebpf-instrumentation

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-45681?

ebpf instrumentation: upgrade to 0.9.0. Exact commands for each OS are on this page.

Is CVE-2026-45681 being exploited?

CVE-2026-45681 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-45681 affect?

CVE-2026-45681 affects ebpf instrumentation. Severity is medium (CVSS 5.9). 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, wh

How urgent is CVE-2026-45681?

Priority 36/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-45685 HIGH 7.5 UPGRADE OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard
CVE-2026-45678 HIGH 7.5 UPGRADE OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard
CVE-2026-45686 HIGH 7.5 UPGRADE OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard
CVE-2026-45680 MEDIUM 5.9 UPGRADE OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard
CVE-2026-45679 MEDIUM 6.5 UPGRADE OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard

References

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