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Fencer Vulns
medium 5.7

CVE-2026-16440 json

In Eclipse OpenJ9 versions up to 0.60, a crafted .class file with deeply nested annotations causes a segmentation fault.

published 2026-08-19 2 mo ago modified 2026-10-22 18 d ago also EUVD-2026-62368

cvss
5.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

In Eclipse OpenJ9 versions up to 0.60, a crafted .class file with deeply nested annotations causes a segmentation fault.

Patch / fix

  • Eclipse Foundation Eclipse OpenJ9 0.60
  • java-21-ibm-semeru-certified-jdk RHEL 10.2 1:21.0.12.1.1-2.el10_2
  • java-21-ibm-semeru-certified-jdk-src RHEL 10.2 1:21.0.12.1.1-2.el10_2
  • java-21-ibm-semeru-certified-jdk-jmods RHEL 10.2 1:21.0.12.1.1-2.el10_2
  • java-21-ibm-semeru-certified-jdk-headless RHEL 10.2 1:21.0.12.1.1-2.el10_2
  • java-1.8.0-ibm RHEL 8 1:1.8.0.8.71-1.el8_10
  • java-1.8.0-ibm-src RHEL 8 1:1.8.0.8.71-1.el8_10
  • java-1.8.0-ibm-demo RHEL 8 1:1.8.0.8.71-1.el8_10
  • java-1.8.0-ibm-jdbc RHEL 8 1:1.8.0.8.71-1.el8_10

red hat advisories RHSA-2026:72888RHSA-2026:70630

  • java-1_8_0-ibm SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +6 more 1.8.0_sr8.71-150000.3.125.1
  • java-1_8_0-ibm SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.8.0_sr8.71-30.156.1

suse advisories SUSE-SU-2026:4153-1SUSE-SU-2026:4107-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-16440 updated cvss 5.7

openj9: Eclipse OpenJ9: Denial of Service via crafted .class file

  • Red Hat Enterprise Linux Supplementary (v. 8) java-1.8.0-ibm 1.8.0.8.71-1.el8_10, java-1.8.0-ibm-src 1.8.0.8.71-1.el8_10, java-1.8.0-ibm-demo 1.8.0.8.71-1.el8_10, java-1.8.0-ibm-jdbc 1.8.0.8.71-1.el8_10, java-1.8.0-ibm-plugin 1.8.0.8.71-1.el8_10, java-1.8.0-ibm-headless 1.8.0.8.71-1.el8_10, +1 more
    fixed: vendor fix RHSA-2026:70630
  • Red Hat Enterprise Linux Supplementary (v. 10) java-21-ibm-semeru-certified-jdk 21.0.12.1.1-2.el10_2, java-21-ibm-semeru-certified-jdk-src 21.0.12.1.1-2.el10_2, java-21-ibm-semeru-certified-jdk-jmods 21.0.12.1.1-2.el10_2, java-21-ibm-semeru-certified-jdk-headless 21.0.12.1.1-2.el10_2 Red Hat Enterprise Linux Supplementary EUS (v. 10.0) java-21-ibm-semeru-certified-jdk 21.0.12.1.1-1.el10_0, java-21-ibm-semeru-certified-jdk-headless 21.0.12.1.1-1.el10_0
    fixed: vendor fix RHSA-2026:72888

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

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

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-ch6r-v7rg-4jqx referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 5.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
CNA 4.0 5.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • Eclipse Foundation Eclipse OpenJ9

Classification

Weakness

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.