CVE-2026-105959
Fixed in a distro release EPSS <1%CVSS 7.5
A flaw was found in spice-server. The GLZ encoder dictionary restore path truncates a size_t 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 max_encoders value in migration data.
Products: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | spice | no fix |
| Debian 13 | spice | no fix |
| Debian 14 | spice | no fix |
| Ubuntu 16.04 LTS | spice | no fix |
| Ubuntu 16.04 LTS | spice-gtk | no fix |
| Ubuntu 16.04 LTS | spice-protocol | no fix |
| Ubuntu 18.04 LTS | spice | no fix |
| Ubuntu 18.04 LTS | spice-gtk | no fix |
| Ubuntu 18.04 LTS | spice-protocol | no fix |
| Ubuntu 20.04 LTS | spice | no fix |
| Ubuntu 20.04 LTS | spice-gtk | no fix |
| Ubuntu 20.04 LTS | spice-protocol | no fix |
| Ubuntu 22.04 LTS | spice | no fix |
| Ubuntu 22.04 LTS | spice-gtk | no fix |
| Ubuntu 22.04 LTS | spice-protocol | no fix |
| Ubuntu 24.04 LTS | spice | no fix |
| Ubuntu 24.04 LTS | spice-gtk | no fix |
| Ubuntu 24.04 LTS | spice-protocol | no fix |
| Ubuntu 26.04 LTS | spice | no fix |
| Ubuntu 26.04 LTS | spice-gtk | no fix |
| Ubuntu 26.04 LTS | spice-protocol | no fix |
| Ubuntu 26.10 | spice | no fix |
| Ubuntu 26.10 | spice-gtk | no fix |
| Ubuntu 26.10 | spice-protocol | no fix |
| Ubuntu Pro 14.04 LTS | spice | no fix |
| openSUSE Tumbleweed | spice | 0.16.0-3.1 |