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Back to active CVEs
High · CVSS 7.5CVE-2026-105958

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

Answer in brief

CVE-2026-105958 records a High severity (CVSS 7.5) vulnerability in Spice-server: spice: heap oob read/write via unchecked migration data offsets. The current sources do not mark it as known exploited. The current feed maps Red Hat/spice (generic), Red Hat/spice-server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 16, 2026Updated Oct 16, 2026Source checked Oct 16, 2026First seen by HOL Oct 16, 2026Material review Oct 16, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/spice (generic), Red Hat/spice-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/spicegeneric*Not reported
Red Hat/spice-servergeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/spice, Red Hat/spice-server.
  2. 2Review the reported fix. Source-reported workaround: This vulnerability is only exploitable during VM live migration by an authenticated SPICE client. If live migration is not required, disabling it eliminates the attack surface. If live migration is needed, restrict SPICE client connections to trusted networks using firewall rules and enforce strong authentication (TLS with mutual certificate validation, or SASL with strong credentials) to limit who can connect as a SPICE client.

Evidence timeline and material changes

  1. Published upstream

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 16, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencegitlab.freedesktop.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Spice-server: spice: heap buffer overflow via glz dictionary max_encoders integer truncationSame red hat/spice package
  • FiboSearch <= 1.34.2 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'purchased_plan' ParameterSame generic ecosystem
  • Social Share Buttons <= 1.30 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'share_url' Network SettingSame generic ecosystem
  • Server-Side Request Forgery in Wegow PDF exportSame generic ecosystem
  • Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content <= 4.17.5 - Authenticated (Subscriber+) Arbitrary Shortcode Execution via Comment Content Rendered on ProfilePress User Profile 'Comments' TabSame generic ecosystem
  • Name Directory <= 1.34.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'dir' Shortcode AttributeSame generic ecosystem

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Oct 16, 2026
References
2 linked sources
Open source record