Is CVE-2026-105958 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-105958?

CVE-2026-105958 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-105958

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.