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Known exploited · Apple

CVE-2022-42856: Apple iOS Type Confusion Vulnerability

What it is

Apple iOS contains a type confusion vulnerability when processing maliciously crafted web content leading to code execution.

Added December 14, 2022Due January 4, 2023CISA KEV catalog 2026.10.01

Vendor
Apple
Product
iOS
Added to KEV
December 14, 2022
CISA due date
January 4, 2023
Ransomware use
Unknown

What CISA requires

Apply updates per vendor instructions.

Forensic triage

No

What to do now

  1. Find every instance of iOS you run, including the forgotten ones, and check its version against the vendor advisory.
  2. Apply the vendor's fix or mitigation, before January 4, 2023 if you are bound by CISA's deadline, sooner if it faces the internet.
  3. Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.

References

CVE-2022-42856 in the National Vulnerability Database

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.