{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-105958", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-10-06T08:37:18.541Z", "datePublished": "2026-10-16T12:18:26.419Z", "dateUpdated": "2026-10-20T20:43:05.003Z"}, "containers": {"cna": {"title": "Spice-server: spice: heap oob read/write via unchecked migration data offsets", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in spice-server. 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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.\n\n--- CME Mitigation Guidance (2026-10-20) ---\nDisclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.\n\nThe highest-value action is to enforce strict bounds validation on client-supplied offsets and buffer lengths across all SPICE migration data handlers prior to memory operations: upgrade to the fixed Spice/Spice Server builds, which validate migration data offsets and read bounds against declared message lengths instead of reallocating from attacker-controlled values, closing all 4 injection vectors (RedCharDevice restore via write_data_ptr offset manipulation, smartcard restore via read_data_ptr offset manipulation, reds agent state restore via msg_header_ptr offset manipulation, DisplayChannelClient migrate data handling via surfaces_at_client_ptr offset manipulation). 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