CVE-2026-92449: medium-severity vulnerability in Eclipse ThreadX - GUIX
Binary resource loader: unbounded map_id from a theme file causes a heap out-of-bounds write in the GUIX-allocated arena
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.2%
`_gx_binres_pixelmap_table_load()` in the GUIX binary resource (theme) loader indexes the pixelmap table with a value read verbatim from the resource file and never bounds it against the table size. A crafted theme drives a write of up to roughly 256 KB past the end of the table.
The overflowed buffer is allocated by GUIX itself, through `_gx_system_memory_allocator`, rather than supplied by the caller, so the loader corrupts its own arena. 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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
Eclipse Foundation · Eclipse ThreadX - GUIXRelated CVEs — Eclipse ThreadX - GUIX
In the same product, most dangerous first.
CVE-2026-91057MEDIUMOut-of-bounds read when a multi-line text view string ends with a carriage returnEPSS 0.2%CVE-2026-91059MEDIUMJPEG decoder: a duplicate SOF0 after SOS publishes a pixelmap that misreports its own allocation sizeEPSS 0.2%CVE-2026-92446MEDIUMGUIX binary resource loader reads past the end of a resource, because no length for it ever reaches the loaderEPSS 0.2%CVE-2026-91186HIGHPNG decoder: a duplicate IHDR chunk after IDAT resizes the image after allocation, causing a heap out-of-bounds writeEPSS 0.2%CVE-2026-92454MEDIUMJPEG decoder: truncated segments are read past the image buffer, and a zero sampling factor hangs the decodeEPSS 0.2%CVE-2026-91189HIGHGUIX binary resource loader: unvalidated glyph range causes an integer underflow and a heap out-of-bounds write when loading an untrusted font or themeEPSS 0.1%