7.5 High

CVE-2026-105958 Spice-server: spice: heap oob read/write via unchecked migration data offsets

Description

A flaw was found in spice-server. Multiple migration data handlers use client-supplied offsets from SPICE_MSGC_MIGRATE_DATA messages without bounds validation, allowing a malicious authenticated SPICE client during VM live migration to read arbitrary heap memory or trigger heap corruption via out-of-bounds read and write operations on the message buffer.

CVSS 3.1 detail

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

Exploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: High
Privileges required: Low
Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 6	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published

References

access.redhat.com access.redhat.com
gitlab.freedesktop.org gitlab.freedesktop.org

Timeline

Published October 16, 2026
Last modified November 4, 2026

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