CVE-2020-9907: Apple Multiple Products Memory Corruption Vulnerability

CVE-2020-9907 is a memory corruption vulnerability affecting multiple Apple products, specifically noted in iOS, iPadOS, and tvOS. It could allow an application to execute code with kernel privileges, which matters because successful abuse can give an attacker deep control over the device beyond normal app sandbox limits. Defenders should treat it as a high-impact local privilege issue on Apple mobile and TV platforms and confirm exact product coverage against the vendor advisory.

How it works

The weakness is classified as CWE-787, an out-of-bounds write that leads to memory corruption. In this class of flaw, software writes data past the bounds of an allocated buffer. On Apple platforms the result can corrupt kernel memory structures. An attacker who can run or influence an application on the device may trigger the corruption so that the application gains kernel-level privileges. Public detail on the precise trigger or required user interaction is limited; treat any untrusted or malicious application as a potential vector and verify the full technical description in Apple’s advisory. No specific exploit mechanics or proof-of-concept details are provided here.

Am I affected? How to find it in your systems

This vulnerability affects Apple multiple products, with the CISA summary calling out iOS, iPadOS, and tvOS. These operating systems typically run on iPhones, iPads, and Apple TV devices managed by enterprises or used by employees. Inventory is straightforward: use mobile-device management (MDM) consoles, Apple Business Manager, or endpoint inventory tools to list all supervised and unsupervised devices and their current OS build numbers. Compare those builds against the fixed versions listed in the vendor advisory; do not rely on guessed version ranges. Also check any corporate-owned Apple TVs or kiosk devices that may be overlooked.

For signs of exploitation, look for unexpected kernel panics, sudden privilege-related crashes, or anomalous process behavior reported by endpoint detection tools that monitor Apple devices. Because the issue allows kernel code execution from an application context, review installation logs and MDM alerts for recently sideloaded or unapproved apps. Telemetry specific to this CVE is not detailed in the provided facts, so correlate any suspicious local activity with the vendor’s guidance and your own baseline of normal device behavior.

How to remediate

Patch first. Apply the updates Apple released for the affected products exactly as described in the vendor advisory and follow the CISA required action: apply updates per vendor instructions. Use MDM to push the fixed OS builds promptly, enforce automatic updates where policy allows, and verify installation success across the fleet. After patching, reboot devices as required by the update process and re-inventory to confirm no systems remain on vulnerable builds.

Beyond the patch, harden the environment for this class of memory-corruption issue: keep the attack surface small by restricting app installation to approved sources, enforce code-signing and notarization checks, and limit the ability of untrusted applications to run. Maintain least-privilege profiles so that even if an app is compromised it starts with minimal entitlements. Regularly review kernel-extension and system-extension policies on managed devices.

If you can't patch immediately

When immediate patching is not possible, apply compensating controls. Segment vulnerable devices onto restricted network segments that limit lateral movement and block unnecessary outbound connections. Use MDM to disable or tightly control features that allow untrusted application execution, such as restricting sideloading or developer mode. Virtual patching via network or host-based controls is limited on these platforms, but you can increase monitoring for anomalous process creation, unexpected privilege escalations, and kernel instability. Disable any non-essential services or apps that increase exposure until the official update can be applied. Document the temporary risk acceptance and set a firm deadline for remediation.

If your data may have been exposed

Actively exploited vulnerabilities of this type can lead to device compromise and subsequent data exposure. Known ransomware use is not documented for this CVE, yet kernel-level access still enables theft of credentials, tokens, or local files. If you suspect compromise, isolate the device, collect forensic artifacts per your incident-response plan, and rotate any credentials that may have been present. As a quick additional check, you can run a free exposure scan of your email addresses against known breach data sets to see whether related accounts appear in prior incidents.