CVE-2026-45684: OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard

Routine

MEDIUM 4.9UPGRADE

CVE-2026-45684 is a medium-severity flaw (CVSS 4.9) 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. 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 ver

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-126, CWE-787
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-2026-45684?

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

Is CVE-2026-45684 being exploited?

CVE-2026-45684 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-2026-45684 affect?

CVE-2026-45684 affects ebpf instrumentation. Severity is medium (CVSS 4.9). 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 t

How urgent is CVE-2026-45684?

Priority 24/100. Public exploit reference

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

← Back to latest CVEs