CVE-2023-42917
High 8.8 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- Apple Multiple Products WebKit Memory Corruption Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Description
A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.
Metrics
- CVSS 3.1
-
8.8 (HIGH)
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 9% (percentile: 95) as of 2 November 2026
- CWE
- CWE-787
Affected products
apple: safari; apple: ipados; apple: iphone os; apple: macos; debian: debian linux; fedoraproject: fedora; webkitgtk: webkitgtk\+
References
- https://support.apple.com/en-us/HT214031 Vendor Advisory
- https://support.apple.com/en-us/HT214032 Vendor Advisory
- https://support.apple.com/en-us/HT214033 Vendor Advisory
- https://support.apple.com/kb/HT214033 Vendor Advisory
- https://support.apple.com/kb/HT214034 Vendor Advisory
- https://support.apple.com/kb/HT214062 Vendor Advisory
- https://support.apple.com/en-us/HT214031 Vendor Advisory
- https://support.apple.com/en-us/HT214032 Vendor Advisory
- https://support.apple.com/en-us/HT214033 Vendor Advisory
- https://support.apple.com/kb/HT214033 Vendor Advisory