---
id: CVE-2023-29551
title: Memory safety bugs present in Firefox 111
summary: >-
  Memory safety bugs present in Firefox 111. Some of these bugs showed evidence
  of memory corruption and we presume that with enough effort some of these
  could have been exploited to run arbitrary code. This vulnerability affects
  Firefox f…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-787
  - CWE-787
vendor: mozilla
product: firefox
affected:
  - firefox < 112.0
  - firefox_mobile < 112.0
  - focus < 112.0
patched:
  - firefox 112.0
  - firefox_mobile 112.0
  - focus 112.0
published: '2023-06-02'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-29551'
references:
  - url: >-
      https://bugzilla.mozilla.org/buglist.cgi?bug_id=1763625%2C1814314%2C1815798%2C1815890%2C1819239%2C1819465%2C1819486%2C1819492%2C1819957%2C1820514%2C1820776%2C1821838%2C1822175%2C1823547
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-13/'
    label: security@mozilla.org
  - url: >-
      https://bugzilla.mozilla.org/buglist.cgi?bug_id=1763625%2C1814314%2C1815798%2C1815890%2C1819239%2C1819465%2C1819486%2C1819492%2C1819957%2C1820514%2C1820776%2C1821838%2C1822175%2C1823547
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-13/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00521
epssPercentile: 0.41832
ingestedAt: '2026-08-19T15:41:15.875Z'
---

## Overview

Memory safety bugs present in Firefox 111. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

## Affected

- `firefox < 112.0`
- `firefox_mobile < 112.0`
- `focus < 112.0`

## Remediation

Upgrade past the affected range:

- `firefox 112.0`
- `firefox_mobile 112.0`
- `focus 112.0`