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CVE-2026-92449
_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.
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The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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