Apple macOS Out-of-Bounds Read Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-04-04

[ Description ]Official description

An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed with improved input validation. This issue is fixed in macOS Monterey 12.3.1, Security Update 2022-004 Catalina, macOS Big Sur 11.6.6. A local user may be able to read kernel memory.

CISA: macOS Monterey contains an out-of-bounds read vulnerability that could allow an application to read kernel memory.

[ 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/HT213220Release NotesVendor Advisory
• support.apple.com/en-us/HT213255Release NotesVendor Advisory
• support.apple.com/en-us/HT213256Release NotesVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogThird Party AdvisoryUS Government Resource