# CVE-2025-43300: ImageIO: Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

CVE-2025-43300 is fixed in 3 products on 1 platform, first by Sequoia 15.6.1, released August 20, 2025. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on August 21, 2025. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/cve/CVE-2025-43300
- Priority: Patch now
- CVSS: 10.0 (CRITICAL)
- EPSS: 0.6516
- CISA KEV: listed Aug 21, 2025, federal due date Sep 11, 2025
- Exploited (vendor report): yes
- Publicly disclosed: no
- Published: Aug 20, 2025
- Vendor advisory: https://support.apple.com/en-us/124929

## Description

An out-of-bounds write issue was addressed with improved bounds checking.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| macOS | Sequoia | 15.6.1 | [Sequoia 15.6.1](https://patchblox.com/security/data/fix/macos/sequoia-15.6.1.md) | Aug 20, 2025 |
| macOS | Sonoma | 14.7.8 | [Sonoma 14.7.8](https://patchblox.com/security/data/fix/macos/sonoma-14.7.8.md) | Aug 20, 2025 |
| macOS | Ventura | 13.7.8 | [Ventura 13.7.8](https://patchblox.com/security/data/fix/macos/ventura-13.7.8.md) | Aug 20, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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