CVE-2026-88340
High
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.
SeverityHigh
CVSS7.6
Exploit probability—
ProductYARA
PublishedSep 22, 2026
First seenSep 22, 2026
Weakness typeCWE-763CWE-763
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| YARA | 4.5.8 | — |
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