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VULNERABILITIES

CVE-2026-88340 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.6 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/VirusTotal/yara/issues/2239 [email protected]
https://github.com/VirusTotal/yara/pull/2244 [email protected]
https://github.com/VirusTotal/yara/pull/2244/changes/8d7bef643ee5fa2381e235bcedf80170a6b00d3b [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-763Release of Invalid Pointer or ReferenceCISA-ADP

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-88340
NVD Published Date:
Sep 22, 2026
NVD Last Modified:
Sep 25, 2026
Source:
[email protected]