Process memory corruption via mismatched writev length
Published Jun 2, 2026 · Updated Jun 2, 2026
Out-of-bounds memory access in OpenTelemetry eBPF Instrumentation 0.7.0 through 0.8.x allows local users to read and corrupt process memory. The __fill_iov function resolves only iov[0], while __write copies and zeros iov_iter.count bytes from that first segment without checking iov_len. Exploitation requires log injection and an instrumented process that performs a crafted multi-segment writev; effects include log disclosure, output corruption, or a process crash.
Summary
What happened
Out-of-bounds memory access in OpenTelemetry eBPF Instrumentation 0.7.0 through 0.8.x allows local users to read and corrupt process memory. The __fill_iov function resolves only iov[0], while __write copies and zeros iov_iter.count bytes from that first segment without checking iov_len. Exploitation requires log injection and an instrumented process that performs a crafted multi-segment writev; effects include log disclosure, output corruption, or a process crash.
The record
- CVE
- CVE-2026-45684
- Published
- Jun 2, 2026
- Updated
- Jun 2, 2026
- Vendor
- OpenTelemetry
- Product
- OpenTelemetry eBPF Instrumentation
- Classifications
- CWE-787, CWE-126
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Jun 2, 2026CVE publishedPublication date reported by the CVE source.
- Jun 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 0.7.0, < 0.9.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- GHSA-vvmg-8mjr-g6q3 writev proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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