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CVE-2026-103414

Quick assessment

Affected
Eclipse Foundation GUIX
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.

GUIX 二进制资源（主题）加载器在两个独立的阶段分别进行内存区域（arena）的大小计算和填充，这两个阶段均遍历资源文件，并使用独立的游标算术逻辑。由于 始终未与页面实际包含的字形数据进行验证比对，导致两个阶段可能对同一字体页面读取不同的页头信息，从而推导出不同的字形数量，并在分配阶段预留的内存少于实际加载阶段写入的数据量。超出部分的数据被写入内存区域边界之外，且写入内容直接取自原始文件数据。 该溢出缓冲区由 GUIX 内部通过 自行分配，而非由调用方提供。公共 API 接口 不接收任何尺寸参数，因此无论调用方如

CVSS 8.4 · High EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 2

VendorProduct Version RangeStatus
Eclipse Foundation GUIX ≤ 6.5.1.202602a affected
6.5.2.202603 unaffected
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I. Basic Information for CVE-2026-103414

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The GUIX binary resource (theme) loader sizes its arena and populates it in two separate passes that traverse the resource file with independent cursor arithmetic. Because `gx_page_header_data_size` is never validated against the glyph data a page actually contains, the two passes can read different page headers for the same font page, derive different glyph counts, and reserve less than the load pass writes. The excess is written past the end of the arena, with content taken verbatim from the file. The overflowed buffer is allocated by GUIX itself, through `_gx_system_memory_allocator`, rather than supplied by the caller. The public API `gx_binres_theme_load()` takes no size parameter, so no amount of caller diligence prevents this. Reproduces in the shipped default configuration; `GX_BINARY_RESOURCE_SUPPORT` is enabled by default.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation GUIX 0 ~ 6.5.1.202602a -

II. Public POCs for CVE-2026-103414

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III. Intelligence Information for CVE-2026-103414

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Other References for CVE-2026-103414 (2)

Same Patch Batch · Eclipse Foundation · 2026-10-14 · 8 CVEs total

CVE-2026-103415 9.3 CRITICAL TLS 1.3 客户端缓冲区溢出漏洞
CVE-2026-102476 9.1 CRITICAL Eclipse Vert.x SSL缓存绕过漏洞
CVE-2026-106464 8.7 HIGH VxWorks 库TLS空签名解析致越界
CVE-2026-106465 8.7 HIGH NetX Secure DTLS服务器存在绕过验证漏洞
CVE-2026-102479 8.7 HIGH Vert.x 5.0-5.2 HTTP请求走私漏洞
CVE-2026-102460 8.6 HIGH CVE-2026-102460
CVE-2026-102471 6.9 MEDIUM CRLF header injection in vertx-mail-client allows manipulation of outgoing SMTP messages

IV. Related Vulnerabilities

Same product: GUIX
Same vendor: Eclipse Foundation
Same weakness: CWE-787

V. Comments for CVE-2026-103414

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