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CVE-2026-111075— JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization

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 0.63.0 之前的 Eclipse OpenJ9 版本中，JITServer 组件在反序列化 消息时，未能对攻击者可控制的 、 和 字段执行跨字段验证。未经身份验证的远程攻击者可以发送精心构造的网络载荷，触发 和 中的无符号整数下溢。这将导致堆越界读取并立即引发进程崩溃（SIGSEGV），从而造成拒绝服务（DoS）。

CVSS 8.7 · High EPSS 0.37% · P30
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I. Basic Information for CVE-2026-111075

Vulnerability Information
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Vulnerability Title
JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component fails to perform cross-field validation on attacker-controlled `_size`, `_paddingSize`, and `_dataOffset` fields during `DataDescriptor` message deserialization. An unauthenticated remote attacker can send a crafted network payload that triggers an unsigned integer underflow in `DataDescriptor::getPayloadSize()` and `DataDescriptor::getNextDescriptor()`. This results in an out-of-bounds heap read and an immediate process crash (SIGSEGV), causing a denial of service.
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
整数下溢(超界折返)
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-2026-111075

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III. Intelligence Information for CVE-2026-111075

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Patches & Fixes for CVE-2026-111075 (1)

Vendor Advisories for CVE-2026-111075 (2)

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-2026-110938 8.7 HIGH JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during

IV. Related Vulnerabilities

Same product: Eclipse OpenJ9
Same vendor: Eclipse Foundation
Same weakness: CWE-191

V. Comments for CVE-2026-111075

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