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CVE-2024-56171 is a use-after-free vulnerability in libxml2 affecting versions before 2.12.10 and 2.13.x before 2.13.6. The flaw is located in the XML Schema processing code in xmlschemas.c, specifically in the functions xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables. It can be triggered during validation of crafted XML content against an XML Schema that uses certain identity constraints, or by supplying a crafted XML Schema itself. The memory-safety error can lead to invalid reuse of freed memory during schema validation, resulting in process instability and potentially more severe consequences depending on allocator state and execution context.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.