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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No vendor fix or workaround currently provided.
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Tue, 20 Oct 2026 16:30:00 +0000
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Tue, 20 Oct 2026 15:00:00 +0000
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| Description | `_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. | |
| Title | Binary resource loader: unbounded map_id from a theme file causes a heap out-of-bounds write in the GUIX-allocated arena | |
| Weaknesses | CWE-129 CWE-457 CWE-787 |
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cvssV4_0
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Subscriptions
No data.
Status: PUBLISHED
Assigner: eclipse
Published:
Updated: 2026-10-20T15:27:55.848Z
Reserved: 2026-09-23T13:43:04.312Z
Link: CVE-2026-92449
Updated: 2026-10-20T15:27:20.915Z
Status : Received
Published: 2026-10-20T15:17:36.617
Modified: 2026-10-20T16:17:16.937
Link: CVE-2026-92449
No data.
OpenCVE Enrichment
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