{"id":"CVE-2026-88340","published":"2026-09-22T20:17:10.250","lastModified":"2026-09-25T20:17:47.427","description":"An invalid pointer release vulnerability exists in YARA 4.5.8 during deserialization of compiled .yrc rule files. The vulnerability is caused by insufficient validation of external-variable pointers, which may lead to invalid free in yr_rules_destroy() or wild pointer access in yr_object_create(). An attacker can provide a specially crafted .yrc file that causes memory corruption and application crash.","cvssScore":7.6,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","cwes":["CWE-763"],"vendors":[],"products":[],"references":[{"url":"https://github.com/VirusTotal/yara/issues/2239","tags":[]},{"url":"https://github.com/VirusTotal/yara/pull/2244","tags":[]},{"url":"https://github.com/VirusTotal/yara/pull/2244/changes/8d7bef643ee5fa2381e235bcedf80170a6b00d3b","tags":[]}],"exploitRefs":[{"url":"https://github.com/VirusTotal/yara/issues/2239","tags":[]},{"url":"https://github.com/VirusTotal/yara/pull/2244","tags":[]},{"url":"https://github.com/VirusTotal/yara/pull/2244/changes/8d7bef643ee5fa2381e235bcedf80170a6b00d3b","tags":[]}],"hasPoc":true,"ai":null}