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Fencer Vulns
low 3.8

CVE-2026-45683 json

OpenTelemetry eBPF Instrumentation: Java TLS ioctl kprobe allows kernel memory disclosure

published 2026-05-18 5 mo ago modified 2026-07-22 3 mo ago also EUVD-2026-33956 , GHSA-fjq3-ffvr-vm46 , GO-2026-5366

cvss
3.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the Java TLS ioctl probe reads user-controlled ioctl pointers with bpf_probe_read instead of bpf_probe_read_user. An instrumented local process can therefore point OBI at kernel memory and cause that memory to be copied into telemetry. This issue has been patched in version 0.9.0.

Patch / fix

  • go go.opentelemetry.io/obi 0.9.0
  • opentelemetry ebpf_instrumentation 0.9.0
  • opentelemetry opentelemetry_ebpf_instrumentation 0.9.0
  • alloy SLES for SAP applications 16.0, SLES 16.0 1.19.2-160000.1.1
  • alloy SLE Module for Basesystem 15 SP7 1.19.2-150700.15.29.1

suse advisories SUSE-SU-2026:24148-1SUSE-SU-2026:4408-1

  • alloy openSUSE Leap 16.0 1.19.2-160000.1.1
  • alloy openSUSE Tumbleweed 1.19.2-1.1
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:22032-1openSUSE-SU-2026:11803-1openSUSE-SU-2026:21483-1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-fjq3-ffvr-vm46 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
GitHub 3.1 3.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
go go.opentelemetry.io/obi
<0.9.0
0.9.0

Affected products

  • open-telemetry opentelemetry-ebpf-instrumentation

Classification

Weakness
  • CWE-127 Buffer Under-read
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.