---
id: CVE-2026-88341
title: >-
  A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted
  .yrc compiled rule files
summary: >-
  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…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-09-22'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:08:22.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88341'
references:
  - url: >-
      https://github.com/NOUIY/yara/commit/0cdff36723cd260243bb2b330bda555693354760
    label: cve@mitre.org
  - url: 'https://github.com/VirusTotal/yara/issues/2238'
    label: cve@mitre.org
  - url: 'https://github.com/VirusTotal/yara/issues/2238'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88341.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-88341'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2538991'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-88341'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88341'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.00168
epssPercentile: 0.05367
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T14:59:42.656278Z'
scores:
  nvd: 5.5
  vendor: 5
ingestedAt: '2026-09-22T20:10:15.097Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88341.json)