CVE-2026-88340CWE-763

CVE-2026-88340

High · published September 23, 2026

CVSS v3.1
7.6
EPSS
0%
Percentile
15.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00250 · 15.4th percentile
Weakness
CWE-763 · Release of Invalid Pointer or Reference
Published
2026-09-23T00:17Z
References (3)
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]
EPSS history
Timeline
  • 24 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 22 SEP 00:00Z
    An invalid pointer release vulnerability exists in YARA 4.5.8 during deserialization of compiled .yrc rule files
    cvelistv5