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CVE-2026-88341 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/VirusTotal/yara/issues/2238	CISA-ADP
https://github.com/NOUIY/yara/commit/0cdff36723cd260243bb2b330bda555693354760	[email protected]
https://github.com/VirusTotal/yara/issues/2238	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-617	Reachable Assertion	CISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 23, 2026	CVE Modified	CISA-ADP
Sep 22, 2026	New CVE Received	[email protected]