CVE-2026-88341

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

22/09/2026

Last modified:

24/09/2026

Description

A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files. An attacker can provide a malicious file with an invalid arena configuration (num_buffers=0) that triggers an assertion failure in yr_arena_get_ptr(), causing the application to terminate.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://github.com/NOUIY/yara/commit/0cdff36723cd260243bb2b330bda555693354760
https://github.com/VirusTotal/yara/issues/2238
https://github.com/VirusTotal/yara/issues/2238