Eclipse GUIX up to 6.5.1.202602a Binary Resource Loader gx_binres_theme_load buffer overflow

Summaryinfo

A vulnerability identified as very critical has been detected in Eclipse GUIX up to 6.5.1.202602a. The affected element is the function gx_binres_theme_load of the component Binary Resource Loader. Performing a manipulation results in buffer overflow. This vulnerability is identified as CVE-2026-103414. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Eclipse GUIX up to 6.5.1.202602a. It has been classified as very critical. This affects the function gx_binres_theme_load of the component Binary Resource Loader. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-103414 since 09/30/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2026).

Upgrading to version 6.5.2.202603 eliminates this vulnerability.

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Productinfo

Vendor

• Eclipse

Name

• GUIX

Version

• 6.5.1.202602a

License

• open-source

CPE 2.3info

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CPE 2.2info

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