Description
In Eclipse OpenJ9 versions up to 0.63.0, the JITServer component is vulnerable to denial of service due to improper boundary checks during protocol message and reply handling. An unauthenticated remote attacker or malicious JITServer can transmit malformed network payloads that cause out-of-bounds heap reads, immediately crashing the JITServer daemon or client JVM process via a segmentation fault (SIGSEGV).
References6
- github.com/eclipse-openj9/openj9/pull/25011
- gitlab.eclipse.org/security/cve-assignment/-/work_items/407
- gitlab.eclipse.org/security/vulnerability-reports/-/work_items/…
- gitlab.eclipse.org/security/vulnerability-reports/-/work_items/…
- gitlab.eclipse.org/security/vulnerability-reports/-/work_items/…
- gitlab.eclipse.org/security/vulnerability-reports/-/work_items/…
Metrics
- CVSS 4.0
-
8.7
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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 - EPSS — exploit probability
- 0% percentile: 36 · as of 8 November 2026
- CWE
- CWE-20CWE-125
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.