CVE-2026-88340

State: Published
Severity: 7.6 High
Published: Sep 22, 2026
Updated: Sep 25, 2026
Reserved: Sep 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H	CISA-ADP

Weaknesses

CWE-763 Release of Invalid Pointer or Reference

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/VirusTotal/yara/issues/2239
https://github.com/VirusTotal/yara/pull/2244
https://github.com/VirusTotal/yara/pull/2244/changes/8d7bef643ee5fa2381e235bcedf80170a6b00d3b

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