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CVE-2026-110938— JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsing

Quick assessment

Affected
Eclipse Foundation Eclipse OpenJ9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Eclipse OpenJ9 0.63.0 及更早版本中，JITServer 组件因在处理协议消息和回复时未进行适当的边界检查，存在拒绝服务（DoS）漏洞。未经身份验证的远程攻击者或恶意的 JITServer 可发送格式错误的网络载荷，引发堆外读（out-of-bounds heap reads），导致 JITServer 守护进程或客户端 JVM 进程因段错误（SIGSEGV）而立即崩溃。

CVSS 8.7 · High EPSS 0.41% · P35
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I. Basic Information for CVE-2026-110938

Vulnerability Information
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Vulnerability Title
JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsing
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse OpenJ9 0.8.0 ~ 0.63 -

II. Public POCs for CVE-2026-110938

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III. Intelligence Information for CVE-2026-110938

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Patches & Fixes for CVE-2026-110938 (1)

Vendor Advisories for CVE-2026-110938 (2)

Other References for CVE-2026-110938 (3)

Same Patch Batch · Eclipse Foundation · 2026-10-21 · 3 CVEs total

CVE-2026-111074 8.7 HIGH JITServer: Pre-authentication remote Denial of Service via integer overflow infinite loop
CVE-2026-111075 8.7 HIGH JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap re

IV. Related Vulnerabilities

Same product: Eclipse OpenJ9
Same vendor: Eclipse Foundation
Same weakness: CWE-125

V. Comments for CVE-2026-110938

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