---
id: CVE-2026-89157
title: >-
  PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert
  out-of-bounds write when an attacker can provide a large pattern.
summary: >-
  PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert
  out-of-bounds write when an attacker can provide a large pattern.
severity: medium
cvss: 5.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-190
  - CWE-787
vendor: pcre
product: pcre2
affected:
  - 'pcre2 >= 10.30, < 10.48'
  - pcre2 = 10.48
patched:
  - pcre2 10.48
published: '2026-09-11'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:25:08.880'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89157'
references:
  - url: 'https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48'
    label: cve@mitre.org
  - url: >-
      https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-q8g2-wprr-34m9
    label: cve@mitre.org
  - url: >-
      https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-q8g2-wprr-34m9
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89157.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89157'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2531744'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89157'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89157'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67534'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.0035
epssPercentile: 0.25895
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-11T16:02:20.626216Z'
ingestedAt: '2026-09-11T16:45:47.859Z'
---

## Overview

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_pattern_convert out-of-bounds write when an attacker can provide a large pattern.

## Affected

- `pcre2 >= 10.30, < 10.48`
- `pcre2 = 10.48`

## Remediation

Upgrade past the affected range:

- `pcre2 10.48`

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89157.json)
- **RHSA-2026:67534** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67534)