Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Exploitability
AV:NAC:HPR:NUI:RScope
S:CImpact
C:HI:HA:N8/CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N