# CVE-2023-42917: Apple Multiple Products WebKit Memory Corruption Vulnerability

Source: https://junglewise.ai/threats/cve-2023-42917-apple-multiple-products-webkit-memory-corruption-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-12-04. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2023-42917 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2023-12-04

A memory corruption vulnerability in WebKit allows for arbitrary code execution when processing maliciously crafted web content. The issue was addressed with improved locking and has been actively exploited in the wild against versions of iOS prior to 16.7.1.

Technologies: [Apple Multiple Products](https://junglewise.ai/threats/technologies/multiple-products). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple).

## Quick answers

**Is CVE-2023-42917 exploited in the wild?** Yes. CVE-2023-42917 is known to be exploited in the wild, first recorded on 4 December 2023. Treat it as urgent.

**How severe is CVE-2023-42917?** Critical severity, with a CVSS score of 8.8, published 4 December 2023.

**Which products and versions are affected?** Apple iOS before 17.1.2; Apple iPadOS before 17.1.2; Apple macOS Sonoma before 14.1.2; Apple Safari before 17.1.2; and 1 more.

**Is there a fix for CVE-2023-42917?** A patch was published on 2023-11-30: Fixed in iOS 17.1.2, iPadOS 17.1.2, macOS Sonoma 14.1.2, and Safari 17.1.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-42917 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2023-42917?** Check whether you run Apple Multiple Products. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Apple iOS before 17.1.2
- Apple iPadOS before 17.1.2
- Apple macOS Sonoma before 14.1.2
- Apple Safari before 17.1.2
- Apple WebKit

## Timeline

- 2023-12-04: disclosed
- 2023-12-04: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-11-30: patched: Fixed in iOS 17.1.2, iPadOS 17.1.2, macOS Sonoma 14.1.2, and Safari 17.1.2
- 2023-12-04: exploited: Apple reported awareness of exploitation in the wild.

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