CVE-2026-59679

SUSE Container suse/kiosk/tigervnc-x11vnc:1.14-63.8

Prioridad media: es grave, pero no se conoce explotación

fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) indexes the per-character encoding[] array using num_chars from the FS_QueryXBitmaps16 reply, but that array was allocated with a size derived from num_extents in the separate FS_QueryXExtents16 reply. The two CARD32 fields are never cross-checked. A malicious or compromised font server can send a small num_extents (e.g. 1) in the extents reply, then a large num_chars (e.g. 100000) in the bitmaps reply. This causes attacker-controlled out-of-bounds heap read and writes.

En las noticias

• Múltiples vulnerabilidades en la aplicación de Repasat · INCIBE-CERT