CVE-2026-92446 — GUIX binary resource loader reads past the end of a resource, because no length for it ever reaches the loader

Description (CNA)

`gx_binres_theme_load()` and `gx_binres_font_load()` take the resource as a bare `GX_UBYTE *` with no length, and `GX_BINRES_DATA_INFO` has no field to carry one. Every read is therefore performed at an offset the file itself chose, against a buffer whose extent the loader does not know. A resource that declares more data than it contains is read past its end, and an offset stored in the file is turned into a pointer without being bounded. This is a distinct defect from GHSA-hgcj-22cg-4hfv, which was an underflowed glyph count. It needs no underflow and no wrapped multiply: a perfectly well-formed, narrow glyph range reaches it.

Affected (CNA)

Vendor / product	Versions
Eclipse Foundation / Eclipse ThreadX - GUIX	affected 0 through 6.5.1.202602a; unaffected 6.5.2.202603

CWE

CWE-125

References

https://github.com/eclipse-threadx/guix/security/advisories/GHSA-m779-jvp3-pmqr

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.