Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability (CVE-2021-30900)

A local attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2023-04-20 under CISA BOD 22-01.

This is a Out-of-bounds Write (CWE-787) vulnerability in Apple iOS, iPadOS, and macOS. An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges. Exploitation requires local access, low attack complexity, no authentication required, and user interaction required.

Probably yes if any of these apply:

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2023-03-30 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2023-04-20.