Apple Multiple Products WebKit Type Confusion Vulnerability
A type confusion issue was addressed with improved checks. This issue is fixed in Safari 17.3, iOS 15.8.7 and iPadOS 15.8.7, iOS 16.7.5 and iPadOS 16.7.5, iOS 17.3 and iPadOS 17.3, macOS Monterey 12.7.3, macOS Sonoma 14.3, macOS Ventura 13.6.4, tvOS 17.3, visionOS 1.0.2. Processing maliciously crafted web content may lead to arbitrary code execution. This fix associated with the Coruna exploit was
What happened
A type confusion issue was addressed with improved checks. This issue is fixed in Safari 17.3, iOS 15.8.7 and iPadOS 15.8.7, iOS 16.7.5 and iPadOS 16.7.5, iOS 17.3 and iPadOS 17.3, macOS Monterey 12.7.3, macOS Sonoma 14.3, macOS Ventura 13.6.4, tvOS 17.3, visionOS 1.0.2. Processing maliciously crafted web content may lead to arbitrary code execution. This fix associated with the Coruna exploit was shipped in iOS 17.3 on January 22, 2024. This update brings that fix to devices that cannot update to the latest iOS version.
CISA lists it as exploited, added 23 Jan 2024.
Does it affect you
Names Apple macOS. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Follow the vendor advisory for the fixed release and any interim mitigation.
support.apple.com - Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- macos
- Apple macOS: 12.0 up to the fix in 12.7.3
The record
- NVD status
- Analyzed
- Published
- 23 Jan 2024, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 8.8, High — computed here from the vector; NVD states 8.8.
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 23 Jan 2024; federal remediation due 13 Feb 2024. CISA entry
- Exploit probability
- EPSS 10.6%, 96th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Apple · Multiple Products (CISA)
References on the NVD record
- support.apple.com/en-us/118479Release NotesVendor Advisory
- support.apple.com/en-us/120304Release NotesVendor Advisory
- support.apple.com/en-us/120305Release NotesVendor Advisory
- support.apple.com/en-us/120307Release NotesVendor Advisory
- support.apple.com/en-us/120309Release NotesVendor Advisory
- support.apple.com/en-us/120310Release NotesVendor Advisory
- support.apple.com/en-us/120311Release NotesVendor Advisory
- support.apple.com/en-us/120339Release NotesVendor Advisory
- support.apple.com/en-us/126632Release NotesVendor Advisory
- support.apple.com/en-us/HT214055Release NotesVendor Advisory
- support.apple.com/en-us/HT214059Release NotesVendor Advisory
- support.apple.com/en-us/HT214061Release NotesVendor Advisory
- support.apple.com/kb/HT214055Release NotesVendor Advisory
- support.apple.com/kb/HT214056Release NotesVendor Advisory
- support.apple.com/kb/HT214057Release NotesVendor Advisory
- support.apple.com/kb/HT214058Release NotesVendor Advisory
- support.apple.com/kb/HT214059Release NotesVendor Advisory
- support.apple.com/kb/HT214061Release NotesVendor Advisory
- support.apple.com/kb/HT214063Release NotesVendor Advisory
- support.apple.com/kb/HT214070Release NotesVendor Advisory
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.