---
id: CVE-2026-105958
title: A flaw was found in spice-server
summary: >-
  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 r…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
vendor: Red Hat
product: spice-server
affected:
  - spice-server (all versions)
  - spice (all versions)
  - spice (all versions)
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:23:18.623'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105958'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-105958'
    label: secalert@redhat.com
  - url: 'https://gitlab.freedesktop.org/spice/spice/-/merge_requests/257'
    label: secalert@redhat.com
tags:
  - nvd
  - cve.org
epss: 0.00246
epssPercentile: 0.15788
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T13:47:11.369874Z'
ingestedAt: '2026-10-16T13:06:42.679Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.