CVE-2026-28981 in macOS
Summary
by MITRE • 07/27/2026
A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Processing a maliciously crafted image may lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 07/27/2026
This vulnerability represents a classic buffer overflow condition that was remediated through enhanced bounds checking mechanisms within the operating system's image processing frameworks. The flaw existed in the handling of malformed image files and affected multiple macOS versions including Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6, indicating a widespread impact across the macOS ecosystem. The vulnerability falls under the common weakness enumeration CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations.
The technical execution of this vulnerability occurs when the system processes specially crafted image files that contain malicious data structures designed to exceed the allocated buffer space during image parsing operations. When an application attempts to read or process such malformed images, the insufficient input validation causes the program to write beyond the intended memory boundaries, potentially allowing an attacker to overwrite critical program variables, return addresses, or other memory segments. This type of vulnerability is particularly dangerous because it can be exploited through seemingly benign image files that users might encounter while browsing the web, opening email attachments, or viewing media content.
The operational impact of this vulnerability extends beyond simple system instability, as it provides attackers with the potential for arbitrary code execution within the context of the affected applications. This means that an attacker who successfully exploits this vulnerability could execute malicious code with the privileges of the targeted application, potentially leading to full system compromise. The attack surface is broad since image processing occurs across many applications including web browsers, email clients, media players, and document viewers, making it a particularly attractive target for threat actors seeking persistent access to systems. This vulnerability aligns with the ATT&CK framework's technique T1203 - Exploitation for Client Execution, where attackers leverage software vulnerabilities to execute malicious code on victim systems.
Mitigation strategies should focus on immediate patch deployment across all affected macOS versions, as the issue was resolved through improved bounds checking mechanisms that validate input data before processing. Organizations should also implement additional defensive measures such as sandboxing image processing applications, deploying network-based intrusion detection systems to monitor for suspicious image file transfers, and establishing robust incident response procedures to detect potential exploitation attempts. Security teams should consider implementing application whitelisting policies that restrict the execution of untrusted image files in sensitive environments, while also monitoring system logs for unusual memory access patterns that might indicate exploitation attempts. The fix demonstrates Apple's proactive approach to vulnerability remediation through improved input validation and bounds checking, which aligns with industry best practices for preventing buffer overflow exploits as outlined in the OWASP Top Ten and similar security frameworks.