CVE-2025-43312: 
macOS vulnerability analysis and mitigation

CVE-2025-43312 is a buffer overflow vulnerability discovered in Apple's macOS operating systems, including macOS Tahoe 26, Sonoma 14.8, and Sequoia 15.7. The vulnerability was disclosed on September 15, 2025, and was identified by ABC Research s.r.o. The affected systems include various Mac models such as Mac Pro (2019), iMac (2020), MacBook Pro (16-inch, 2019), and other Apple devices (Apple Support).

The vulnerability is characterized as a buffer overflow issue in the AMD component of macOS. The security flaw could allow an application to cause unexpected system termination. The issue was addressed by implementing improved bounds checking in the system. The vulnerability has received a CVSS 3.1 Base Score of 5.5 (MEDIUM) with a vector string of CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (NVD).

When exploited, this vulnerability can allow a malicious application to cause unexpected system termination, potentially leading to system crashes and service disruption. The vulnerability affects the system's stability but does not appear to compromise data confidentiality or integrity (Apple Support, NVD).

Apple has addressed this vulnerability by implementing improved bounds checking in the affected systems. Users are advised to update to the latest versions of their respective operating systems: macOS Tahoe 26, macOS Sonoma 14.8, or macOS Sequoia 15.7, depending on their system (Apple Support).

The vulnerability has been acknowledged by security researchers and included in Apple's September 2025 security updates. ASEC (AhnLab Security Emergency Response Center) has issued an advisory recommending users to update to the latest versions of affected Apple products (ASEC).