New Actively Exploited Zero-Day Vulnerability Discovered in Apple Products

CVE-2022-22587 is a memory corruption flaw (CWE-787, out-of-bounds write) in Apple's operating systems that Apple addressed with improved input validation. It is triggered by a malicious application already running on a vulnerable device, which can exploit the corruption to execute arbitrary code with kernel privileges — the highest privilege level of the OS. All iPhones and iPads running iOS/iPadOS versions earlier than 15.3 and Macs running macOS Monterey earlier than 12.2 or Big Sur earlier than 11.6.3 are affected. Apple reported the issue as actively exploited, and CISA added it to the Known Exploited Vulnerabilities catalog on 2022-01-28; EPSS rates it at 11.6% probability of exploitation in the next 30 days (96th percentile). It was one of two actively exploited Apple zero-days patched in Apple's January 2022 emergency updates.

Do: Update iPhones and iPads to iOS/iPadOS 15.3 and Macs to macOS Monterey 12.2 or Big Sur 11.6.3 (or later). Inventory managed fleets for devices below these versions, since the flaw is exploited in the wild and CISA KEV requires applying vendor updates. Until devices are patched, limit exposure by avoiding installation of untrusted applications on vulnerable iPhones, iPads, and Macs.

A cross-origin issue in the IndexDB API was addressed with improved input validation. This issue is fixed in iOS 15.3 and iPadOS 15.3, watchOS 8.4, tvOS 15.3, Safari 15.3, macOS Monterey 12.2. A website may be able to track sensitive user information.

CVE-2022-22620 is a use-after-free (CWE-416) in Apple's WebKit browser engine, the component that renders web content on iPhones, iPads, Macs, and Safari. An attacker triggers it by getting a victim to process maliciously crafted web content, such as visiting an attacker-controlled webpage, requiring no privileges and only user interaction with the content. Successful exploitation may lead to arbitrary code execution in the context of the browser, with high impact on confidentiality, integrity, and availability (CVSS 3.1: 8.8 High). All devices running iOS or iPadOS before 15.3.1, macOS Monterey before 12.2.1, or Safari before 15.3 are affected, which effectively means the broad Apple user base at the time of disclosure. Apple reported the issue may have been actively exploited in the wild; it was added to CISA's Known Exploited Vulnerabilities catalog on 2022-02-11 and carries a 16.2% EPSS probability of exploitation in the next 30 days (97th percentile).

Do: Update iPhones and iPads to iOS/iPadOS 15.3.1, Macs to macOS Monterey 12.2.1, and Safari to version 15.3 (builds 16612.4.9.1.8 or 15612.4.9.1.8), per Apple's vendor instructions. Inventory for devices still on pre-patch versions, prioritizing user workstations and mobile devices that browse web or HTML email content, since WebKit loads content automatically. Note the vulnerability is listed in CISA's KEV catalog with 'apply updates per vendor instructions' as the required action, so patching is the only reliable mitigation.

CVE-2022-22675 is an out-of-bounds write vulnerability (CWE-787) in the Apple kernel, addressed through improved bounds checking. It is triggered locally — the CVSS vector shows a local attack vector with user interaction, meaning an application running on the device can trigger the memory corruption. Successful exploitation allows an application to execute arbitrary code with kernel privileges, giving the attacker full control over the affected device. Users of iPhone, iPad, Mac, Apple TV, and Apple Watch running versions prior to the fixed releases are affected. Apple reported that the issue may have been actively exploited in the wild, and CISA added it to the Known Exploited Vulnerabilities catalog on 2022-04-04.

Do: Update to iOS/iPadOS 15.4.1, macOS Monterey 12.3.1 or macOS Big Sur 11.6.6, tvOS 15.5, and watchOS 8.6 as required by CISA. Because the flaw is exploited in the wild and requires only a malicious local application, prioritize patching user-facing iPhone, iPad, and Mac fleets first. There is no public PoC; verify installed OS versions on managed devices and confirm remediation after the updates are applied.

CVE-2022-32893 is an out-of-bounds write flaw (CWE-787) in Apple's WebKit browser engine, caused by insufficient bounds checking. It is triggered when a device processes maliciously crafted web content, meaning a user can be attacked simply by loading an attacker-controlled webpage. A successful exploit allows arbitrary code execution on the victim's device, with high impact on confidentiality, integrity, and availability (CVSS 3.1: 8.8). Affected users include anyone running iOS/iPadOS before 15.6.1, macOS Monterey before 12.5.1, or Safari before 15.6.1, as well as consumers of WebKitGTK and WPE WebKit shipped in Fedora and Debian. Apple confirmed the issue was being actively exploited in the wild, and CISA added it to the Known Exploited Vulnerabilities catalog on 2022-08-18; EPSS estimates a 9.9% probability of exploitation in the next 30 days (95th percentile), while no public PoC is known.

Do: Immediately update to iOS 15.6.1, iPadOS 15.6.1, macOS Monterey 12.5.1, and Safari 15.6.1; per vendor reporting, Apple also released updates for older iPhone models, and users of devices running the iOS 15.7 beta should apply 15.6.1. Fedora and Debian users should install the patched WebKitGTK/WPE WebKit packages from their distribution's advisories. Because exploitation requires only loading malicious web content, there is no reliable workaround — prioritize patching on all endpoints that browse web content, and treat unpatched Apple devices as actively targeted.

CVE-2022-32917 is an out-of-bounds write (CWE-787) in the Apple operating system kernel that the vendor fixed with improved bounds checks. A local application running on a vulnerable device can trigger the flaw to execute arbitrary code with kernel privileges, giving an attacker full control of the device; the local (AV:L) attack vector means the attacker must already be able to run code on the device, such as through a malicious app, rather than reaching the flaw over the network. Users of Apple devices running iOS, iPadOS, or macOS versions earlier than the fixed releases are affected. Apple reported that the issue may have been actively exploited in the wild, and CISA added it to the Known Exploited Vulnerabilities Catalog on 2022-09-14 with no public proof-of-concept known.

Do: Update affected devices without delay to iOS 16 or iOS 15.7, iPadOS 15.7, macOS Monterey 12.6, or macOS Big Sur 11.7 (or any later release). Inventory Apple endpoints for outdated OS versions and prioritize patching because the flaw is on CISA's KEV catalog and was reported actively exploited. Since exploitation requires already running code on the device, review installed apps and treat the flaw as exploitable when chained with other local or app-delivery attack vectors.

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.

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.

CVE-2022-42856 is a type confusion vulnerability (CWE-843) in Apple's WebKit web engine, addressed with improved state handling and affecting Safari, iPhone OS (iOS), iPadOS, macOS (Ventura) and tvOS. It is triggered when a user processes maliciously crafted web content, for example by visiting an attacker-controlled web page, in a WebKit-based browser or app. Successful exploitation may lead to arbitrary code execution on the affected device. Anyone running the affected Apple platforms below the December 2022 patch level (Safari 16.2, macOS Ventura 13.1, tvOS 16.2, iOS/iPadOS 15.7.2, iOS 16.1.2) was exposed, which effectively means most Apple users at the time of disclosure. Exploitation is confirmed: Apple reported the issue may have been actively exploited against iOS versions released before iOS 15.1, it was added to CISA KEV on 2022-12-14 (EPSS 8.5%, 95th percentile), and related reporting ties it to commercial spyware campaigns in Italy, Malaysia, Kazakhstan and the UAE.

Do: Update immediately to Safari 16.2, macOS Ventura 13.1, tvOS 16.2, and iOS/iPadOS 15.7.2 (for iOS 15-era devices) or iOS 16.1.2 (for iOS 16-era devices), or any later release; this is a CISA KEV entry whose required action is to apply vendor updates. Because the flaw was exploited as a zero-day against iOS versions before iOS 15.1 and is linked to commercial spyware campaigns, treat patching as urgent and verify that all managed and BYOD iPhones and iPads are on a fixed version; on iOS, all third-party browsers and most web-content apps use WebKit, so the OS update itself is the remediation rather than switching browsers.