Memory Corruption Vulnerability in Apple macOS, iOS, and iPadOS

Historical catalog analysis: CISA added this entry on March 05, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2023-43000 is a use-after-free vulnerability (CWE-416) identified in Apple macOS, iOS, iPadOS, and Safari 16.6. The flaw occurs during the processing of maliciously crafted web content. According to CISA, this vulnerability may lead to memory corruption on affected devices.

Exposure and applicability

This vulnerability is particularly relevant to U.S. healthcare providers and business associates who utilize Apple hardware for clinical workflows. In many healthcare environments, iPads and iPhones are used for bedside charting, patient portals, and mobile health applications, while macOS devices are common in administrative and clinical documentation roles. Because the entry path involves web content, any device used to browse the internet or render web-based interfaces may be exposed if it is running a susceptible version of these operating systems.

Remediation priorities

Our analysis suggests that healthcare security leaders should prioritize updates based on the device’s role in handling electronic Protected Health Information (ePHI) and its level of exposure to external web content. We recommend the following prioritized actions:

1. Update Operating Systems: Prioritize the deployment of vendor-provided updates for iOS, iPadOS, and macOS across all clinical and administrative fleets. This is the primary control intended to prevent the initial memory corruption flaw.
2. Safari Version Audit: Specifically verify that Safari 16.6 has been updated to a version containing the fix, as this browser is the primary vector for processing the crafted web content mentioned in the vulnerability report.
3. Review Mobile Device Management (MDM) Policies: Ensure that MDM profiles are configured to enforce minimum OS versions, reducing the likelihood that outdated, vulnerable devices remain active on the clinical network.

How to validate remediation

To verify that exposure has been reduced, security and clinical engineering teams should use the following methods:

• Version Verification: Use an MDM dashboard or manual system checks to confirm that macOS, iOS, and iPadOS versions are current and no longer match the affected ranges associated with CVE-2023-43000.
• Inventory Audit: Cross-reference the list of active devices against the vendor’s patched version list to identify any legacy hardware that may no longer support updated operating systems.

Note: A version check indicates a patch has been applied but does not guarantee absolute security against all future or unknown threats.

Limits and open questions

While CISA has added this vulnerability to its Known Exploited Vulnerabilities catalog, the source does not specify whether it has been used in ransomware campaigns. Additionally, while memory corruption is confirmed as a potential impact, the specific capabilities an attacker could achieve following such corruption—such as the ability to execute arbitrary code or bypass specific sandbox protections—remain unspecified in the provided data. Organizations should continue to monitor vendor guidance for further details on the exploit’s behavior.

Source and editorial note

CVE-2023-43000: Apple Multiple products Use-After-Free Vulnerability · Source date: March 05, 2026 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: March 08, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 17, 2026 at 00:49 UTC.

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