CVE-2026-16243Network attack vector

Runtime interruption via zero-length SIMD comparison

Published Jul 21, 2026 · Updated Jul 21, 2026

Out-of-bounds read in Eclipse OMR before 0.11 allows remote authenticated users to interrupt dependent runtimes via zero-length comparisons. The IBM Z evaluator enters its SIMD loop when the byte count is zero and returns a mismatch; Power arraycmp and arraycmplen likewise fail to treat zero-length regions as equal. Exploitation requires low privileges, active user interaction, and affected IBM Z or Power generated code; the vendor reports availability impacts only.

CVSS severity5.7
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Eclipse OMR before 0.11 allows remote authenticated users to interrupt dependent runtimes via zero-length comparisons. The IBM Z evaluator enters its SIMD loop when the byte count is zero and returns a mismatch; Power arraycmp and arraycmplen likewise fail to treat zero-length regions as equal. Exploitation requires low privileges, active user interaction, and affected IBM Z or Power generated code; the vendor reports availability impacts only.

The record

CVE
CVE-2026-16243
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
The Eclipse Foundation
Product
Eclipse OMR
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 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.

  1. Affected versionversion=0.1 <0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Eclipse Foundation · Eclipse OMRversion=0.1 <0.11

Published CVSS scores

5.7Eclipse FoundationCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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