Low [CVE-2025-71346] Heap buffer under-read in XML Schema validation
This low-severity Red Hat Linux advisory covers CVE-2025-71346 affecting Red Hat 3scale API Management Platform 2, Red Hat Satellite 6.
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Summary
Nokogiri before 1.18.8 packages a vulnerable version of libxml2 (before 2.13.8) that contains a heap-based buffer under-read (CVE-2025-32415) in the xmlSchemaIDCFillNodeTables function in xmlschemas.c.
The issue can be triggered when validating against an untrusted XML Schema, or when validating untrusted documents against trusted schemas that use xsd:keyref in combination with recursively defined types that have additional identity constraints. Upstream and MITRE rate this issue as low severity.
This heap-based buffer under-read vulnerability, located in the xmlSchemaIDCFillNodeTables function, can be triggered when processing untrusted XML Schemas or documents. A remote attacker could exploit this by providing specially crafted XML input, which may lead to unexpected application behavior or a limited denial of service (DoS).
Red Hat severity: Low — CVSS 2.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-125.
Affected Red Hat products: Red Hat 3scale API Management Platform 2; Red Hat Satellite 6. Will not fix / out of support: Red Hat 3scale API Management Platform 2.
Red Hat does not currently list a fixing RHSA for this CVE.
- < 1.18.8
- < 2.13.8
Official advisory · high-confidence parse· fetched 58 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 58 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 58 minutes ago·verify at source
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