CVE-2026-45686: OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard

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HIGH 7.5REMOTEUPGRADE

CVE-2026-45686 is a high-severity flaw (CVSS 7.5) 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. From version 0.7.0 to before version 0.9.0, a remotely reachable integer overflow in OBI's memcached text protocol parser can crash the OBI process and cause denial of service. When parsing memcached storage commands such as set, add, replace, append, prepend, or cas, OBI accepts extremely large <bytes> values and adds the payload delimiter lengt

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-190
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: >= 0.7.0 and < 0.9.0

Fixed in: 0.9.0

Safe to downgrade to: a release before 0.7.0

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.

3. If no update is available yet, DOWNGRADE to a release before 0.7.0 (Debian / Ubuntu)

apt-cache madison ebpf-instrumentation sudo apt install ebpf-instrumentation=<VERSION_BEFORE_0.7.0> sudo apt-mark hold ebpf-instrumentation

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ebpf-instrumentation sudo dnf downgrade ebpf-instrumentation-<VERSION_BEFORE_0.7.0> sudo dnf versionlock add ebpf-instrumentation

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-45686?

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

Is CVE-2026-45686 being exploited?

CVE-2026-45686 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-2026-45686 affect?

CVE-2026-45686 affects ebpf instrumentation. Severity is high (CVSS 7.5). OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. From version 0.7.0 to before version 0.9.0, a remotely reachable integer overflow in OBI's memcached text protocol parser can crash the OB

How urgent is CVE-2026-45686?

Priority 43/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Memcached vulnerabilities

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-2026-45680 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
CVE-2026-45681 MEDIUM 5.9 UPGRADE OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard

References

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