On 32-bit versions there were integer-overflows that led to an out-of-bounds-read that potentially could be triggered by a malformed OpenType font. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.
125125115.10125115.10115.10Exploitability
AV:NAC:HPR:NUI:RScope
S:UImpact
C:LI:HA:N5.9/CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N