{"id":"AZL-96932","summary":"CVE-2026-76641 affecting package expat for versions less than 2.8.3-2","details":"Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.","modified":"2026-09-16T06:39:01Z","published":"2026-08-20T18:16:51Z","upstream":["CVE-2026-76641"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76641"}],"affected":[{"package":{"name":"expat","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/expat"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.3-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96932.json"}}],"schema_version":"1.9.0"}