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CVE-2026-45684— OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite user buffers

CVSS 4.9 · Medium

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProductVersion RangeStatus
open-telemetryopentelemetry-ebpf-instrumentation>= 0.7.0, < 0.9.0affected
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I. Basic Information for CVE-2026-45684

Vulnerability Information
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Vulnerability Title
OpenTelemetry eBPF Instrumentation: Log enricher writev path can overread and overwrite user buffers
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
缓冲区上溢读取
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
open-telemetryopentelemetry-ebpf-instrumentation >= 0.7.0, < 0.9.0 -

II. Public POCs for CVE-2026-45684

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III. Intelligence Information for CVE-2026-45684

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Vendor Advisories for CVE-2026-45684 (1)

Vendor Pages for CVE-2026-45684 (1)

Same Patch Batch · open-telemetry · 2026-06-02 · 10 CVEs total

CVE-2026-456857.5 HIGHOpenTelemetry eBPF Instrumentation: MongoDB parser panics on malformed wire messages
CVE-2026-456867.5 HIGHOpenTelemetry eBPF Instrumentation: Memcached payload length overflow can crash OBI
CVE-2026-456787.5 HIGHOpenTelemetry eBPF Instrumentation: Postgres BIND parsing can panic on malformed payloads
CVE-2026-456796.5 MEDIUMOpenTelemetry eBPF Instrumentation: Redis error text is exported in span status messages
CVE-2026-456815.9 MEDIUMOpenTelemetry eBPF Instrumentation: CPU-mismatch fallback uses 256-byte buffer with 8KB si
CVE-2026-456805.9 MEDIUMOpenTelemetry eBPF Instrumentation: Unbounded BPF internal metrics replay can exhaust CPU
CVE-2026-456765.5 MEDIUMOpenTelemetry eBPF Instrumentation: Unsafe fastelf parsing allows malformed ELF to crash a
CVE-2026-456825.1 MEDIUMOpenTelemetry eBPF Instrumentation: CappedConcurrentHashMap leaks keys after removals
CVE-2026-456833.8 LOWOpenTelemetry eBPF Instrumentation: Java TLS ioctl kprobe allows kernel memory disclosure

IV. Related Vulnerabilities

Same product: opentelemetry-ebpf-instrumentation
Same vendor: open-telemetry
Same weakness: CWE-126

V. Comments for CVE-2026-45684

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