CVE-2024-23296: Apple Multiple Products Memory Corruption Vulnerability

CVE-2024-23296 is a memory corruption vulnerability in RTKit across multiple Apple operating systems, including iOS, iPadOS, macOS, tvOS, and watchOS. It can allow an attacker who already has arbitrary kernel read and write capability to bypass kernel memory protections. For IT and security teams managing Apple fleets, this matters because successful abuse can undermine core OS isolation and enable deeper system compromise once initial kernel access is obtained. Confirm all product and version details against the vendor advisory.

How it works

The weakness is classified as CWE-787, an out-of-bounds write that produces memory corruption. In this case the flaw resides in Apple RTKit. An attacker who has already achieved arbitrary kernel read and write can leverage the corruption to bypass kernel memory protections that would otherwise limit further access or modification. Public detail on the precise trigger or required preconditions is limited; defenders should treat it as a post-compromise escalation path within the kernel rather than a remote initial-access vector. Exact exploitation mechanics must be confirmed against the vendor advisory.

Am I affected? How to find it in your systems

The vulnerability affects Apple devices running iOS, iPadOS, macOS, tvOS, or watchOS that include the vulnerable RTKit component. These products commonly appear as employee iPhones and iPads, corporate Macs, Apple TVs in conference rooms, and Apple Watches enrolled in MDM.

• Inventory all managed Apple devices through your MDM, Apple Business Manager, or endpoint management console and record the exact OS version of each.
• Cross-check those versions against the list of fixed releases published in Apple’s security advisory for CVE-2024-23296; any device still on an unpatched build is potentially affected.
• Review kernel and system logs for unexpected memory-related faults, panics, or anomalous kernel activity that could indicate attempted abuse, though such telemetry is not definitive.
• Confirm configuration and version status directly with the vendor advisory, as public detail on exact affected builds is limited here.

How to remediate

Patching is the primary remediation. Apply the vendor-supplied updates that address CVE-2024-23296 for each affected platform as soon as they can be tested and deployed. Follow Apple’s published instructions for iOS, iPadOS, macOS, tvOS, and watchOS. After installation, verify the new OS version on a sample of devices to confirm the fix is present. CISA’s required action is to apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Once patched, re-enable any temporarily disabled features only after validating stability.

If you can't patch immediately

Until the vendor update can be applied, reduce exposure with compensating controls appropriate to this class of kernel memory-corruption issue.

• Segment Apple devices onto restricted network zones that limit lateral movement and reduce the chance an attacker can reach a vulnerable endpoint after initial compromise.
• Enforce strong device-management policies that prevent installation of untrusted profiles or apps that could help an attacker obtain the prerequisite kernel read/write capability.
• Increase monitoring of kernel logs, crash reports, and endpoint detection alerts for signs of memory corruption or privilege-escalation attempts.
• Where feasible, disable non-essential services or features that interact with RTKit until the patch is installed; confirm any such disablement against the vendor advisory.
• Consider temporary virtual-patching or network-level filtering only if your security tools support Apple-specific signatures for this CVE; otherwise rely on segmentation and monitoring.

These steps lower risk but do not eliminate it; schedule the official update as the permanent fix.

If your data may have been exposed

Vulnerabilities that enable kernel memory-protection bypass can lead to full device compromise and subsequent data exposure if an attacker already possesses kernel access. Known ransomware use of this CVE is not documented. If you suspect compromise, isolate affected devices, preserve forensic images, and rotate credentials that may have been present on them. You can also run a free exposure scan of your email addresses against known breach data to check whether related accounts appear in public breach corpora.