How severe is CVE-2026-45684?

CVE-2026-45684 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-45684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45684?

CVE-2026-45684 affects Opentelemetry Ebpf Instrumentation. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45684?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45684 have an EU (EUVD) identifier?

Yes. CVE-2026-45684 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33957.

When was CVE-2026-45684 published?

CVE-2026-45684 was published on 2026-06-02 and last updated on 2026-06-17.

CVE-2026-45684

CVE-2026-45684 is a medium-severity vulnerability in Opentelemetry Ebpf Instrumentation with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-126.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33957
Weakness: CWE-126
Affected product: Opentelemetry Ebpf Instrumentation
Published: 2026-06-02
Last modified: 2026-06-17

Description

OpenTelemetry 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.

Frequently asked questions

What is CVE-2026-45684?: OpenTelemetry 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.
How severe is CVE-2026-45684?: CVE-2026-45684 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-45684 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45684?: CVE-2026-45684 affects Opentelemetry Ebpf Instrumentation. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45684?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45684 have an EU (EUVD) identifier?: Yes. CVE-2026-45684 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33957.
When was CVE-2026-45684 published?: CVE-2026-45684 was published on 2026-06-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opentelemetry:ebpf_instrumentation:*:*:*:*:*:go:*:*

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