Apple macOS Out-of-Bounds Write Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-04-04
• EPSS: 12% chance of exploitation in the next 30 days (higher than 96% of CVEs)

[ Description ]Official description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in tvOS 15.5, watchOS 8.6, macOS Big Sur 11.6.6, macOS Monterey 12.3.1, iOS 15.4.1 and iPadOS 15.4.1. An 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: macOS Monterey contains an out-of-bounds write vulnerability that could allow an application to execute arbitrary code with kernel privileges.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 25 Apr 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/HT213219Release NotesVendor Advisory
• support.apple.com/en-us/HT213220Release NotesVendor Advisory
• support.apple.com/en-us/HT213253Release NotesVendor Advisory
• support.apple.com/en-us/HT213254Release NotesVendor Advisory
• support.apple.com/en-us/HT213256Release NotesVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogThird Party AdvisoryUS Government Resource