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Vendor 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.
Tracking
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Fri, 16 Oct 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Fri, 16 Oct 2026 12:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Spice-server: spice: heap buffer overflow via glz dictionary max_encoders integer truncation | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| Weaknesses | CWE-190 | |
| CPEs | cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-10-16T14:04:46.377Z
Reserved: 2026-10-06T08:37:18.542Z
Link: CVE-2026-105959
Updated: 2026-10-16T14:04:37.891Z
Status : Received
Published: 2026-10-16T12:16:31.733
Modified: 2026-10-16T14:17:16.300
Link: CVE-2026-105959
No data.
OpenCVE Enrichment
Updated: 2026-10-16T13:41:27Z
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CWE-190
Integer Overflow or Wraparound