CVE-2026-105959

Published: Oct 16, 2026Modified: Oct 16, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.6 / Impact: 5.9

Source: secalert@redhat.com (Secondary)

Description

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.

Related CWEs

CWE-190

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (3)

https://access.redhat.com/security/cve/CVE-2026-105959

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2554008

Source: secalert@redhat.com

https://gitlab.freedesktop.org/spice/spice/-/merge_requests/253

Source: secalert@redhat.com

Timeline

No history available yet.