CVE-2025-43254

Vulnerability

Details

CVE-2025-43254 is an out-of-bounds read vulnerability in macOS. The root cause is improper input validation during the processing of specially crafted files. This memory handling flaw can cause the application to read beyond the bounds of allocated memory, leading to a crash or termination. [1][2][3]

Exploitation

The attack surface is file-based: an attacker would need to deliver a maliciously crafted file to a target user. No additional privileges are required beyond the ability to open or process the file in an affected macOS application. The vulnerability is triggered when the system parses the malformed file, potentially requiring user interaction (e.g., opening an email attachment or downloading a file). [1][4]

Impact

Successful exploitation results in unexpected app termination. While the primary impact is a denial of service (DoS), out-of-bounds reads in memory-unsafe contexts can sometimes lead to information disclosure or code execution, though the official description only confirms app termination. [1][2][3]

Mitigation

Apple has released patches in macOS Sequoia 15.6, macOS Sonoma 14.7.7, and macOS Ventura 13.7.7. Users should update to the latest operating system version to remediate this vulnerability. Apple does not provide workarounds for this issue and recommends applying the security updates as soon as possible. [1][2][3]