CVE-2026-105959

A flaw in spice-server allows an authenticated SPICE client to trigger a massive heap buffer overflow during a VM live migration. The root cause is an integer truncation where a size_t allocation size is truncated to int when calling the malloc callback during the GLZ encoder dictionary restore p...

CVE-2026-105959 Spice-server: spice: heap buffer overflow via glz dictionary max_encoders integer truncation

A flaw was found in spice-server. The GLZ encoder dictionary restore path truncates a sizet allocation size to int when calling the malloc callback, allowing a malicious authenticated SPICE client during VM live migration to trigger a massive heap buffer overflow by sending a crafted maxencoders...