Apple Memory Corruption Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-01-28
• EPSS: 12% chance of exploitation in the next 30 days (higher than 96% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 15.3 and iPadOS 15.3, macOS Big Sur 11.6.3, macOS Monterey 12.2. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

CISA: Apple IOMobileFrameBuffer contains a memory corruption vulnerability which can allow a malicious application to execute arbitrary code with kernel privileges.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 11 Feb 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• support.apple.com/en-us/HT213053Release NotesVendor Advisory
• support.apple.com/en-us/HT213054Release NotesVendor Advisory
• support.apple.com/en-us/HT213055Release NotesVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogThird Party AdvisoryUS Government Resource