CVE-2026-105959

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-105959
https://bugzilla.redhat.com/show_bug.cgi?id=2554008
https://gitlab.freedesktop.org/spice/spice/-/merge_requests/253

Configurations

No configuration.

History

16 Oct 2026, 12:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 12:16

Updated : 2026-10-16 19:23

NVD link : CVE-2026-105959

Mitre link : CVE-2026-105959

CVE.ORG link : CVE-2026-105959

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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