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PatchSiren cyber security CVE debrief

CVE-2022-42856 Apple CVE debrief

CVE-2022-42856 is an Apple iOS type confusion vulnerability that CISA included in its Known Exploited Vulnerabilities catalog on the same day it was published. Because it is a KEV-listed issue, defenders should treat it as a high-priority patching item and follow Apple’s update guidance without delay.

Vendor
Apple
Product
iOS
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-12-14
Original CVE updated
2022-12-14
Advisory published
2022-12-14
Advisory updated
2022-12-14

Who should care

Organizations that manage Apple iOS devices, especially security teams responsible for mobile device patching, fleet compliance, and exposure reduction. This is also important for any environment that allows personally owned or corporate iPhones and iPads to access business resources.

Technical summary

The available source corpus identifies the issue as a type confusion vulnerability in Apple iOS. No CVSS score, affected-version range, or exploit mechanics are provided in the supplied sources. The key defensive signal is that CISA lists it as known exploited, which raises remediation urgency regardless of the limited technical detail in the corpus.

Defensive priority

High. CISA has placed this CVE in the Known Exploited Vulnerabilities catalog, which indicates confirmed exploitation and a need for prompt remediation according to vendor instructions.

Recommended defensive actions

  • Apply Apple security updates per vendor instructions as soon as possible.
  • Prioritize remediation for internet-facing, high-value, and unmanaged iOS devices.
  • Verify that mobile device management and asset inventories can identify affected Apple iOS endpoints.
  • Track patch compliance against the CISA KEV due date of 2023-01-04 for this item.
  • Monitor Apple security release notes and your endpoint telemetry for residual exposure.

Evidence notes

The supplied sources identify CVE-2022-42856 as an Apple iOS type confusion vulnerability and show that CISA added it to the Known Exploited Vulnerabilities catalog on 2022-12-14 with a remediation due date of 2023-01-04. The corpus also includes Apple’s support reference and NVD’s CVE detail page, but no additional technical specifics were provided here. No unsupported exploit details are inferred.

Official resources

Publicly published on 2022-12-14 and added to CISA’s KEV catalog the same day. The supplied corpus does not provide additional disclosure timeline details beyond those dates.