CVE-2022-42827

CVE-2022-42827 is an out-of-bounds write (CWE-787) in the kernel of Apple iOS and iPadOS, caused by insufficient bounds checking and fixed with improved bounds checking. It is triggered locally by a malicious application running on a vulnerable device, consistent with the CVSS vector (local attack vector, user interaction required, no special privileges). A successful attacker can execute arbitrary code with kernel privileges, escaping the app sandbox and gaining full control of the device's operating system layer. Any iPhone or iPad running iOS/iPadOS versions below the fixed releases (iOS 15.7.1, iPadOS 15.7.1, iOS 16.1, iPadOS 16) is affected, which at the time of disclosure covered essentially the entire unpatched iOS/iPadOS fleet. Apple reported the flaw may have been actively exploited, and CISA added it to the Known Exploited Vulnerabilities catalog on 2022-10-25; no public proof-of-concept is known, but in-the-wild exploitation is confirmed.

What to do: Update all iPhones and iPads to iOS 15.7.1 / iPadOS 15.7.1 at minimum, or preferably iOS 16.1 / iPadOS 16 or later. Because exploitation requires running a malicious app on the device, treat unpatched devices as at-risk, verify fleet OS builds via MDM or device inventory, and restrict app installs from untrusted sources until patched. The CVE is on CISA's KEV list, making patching mandatory for federal agencies and strongly recommended for all organizations.