An out-of-bounds read was addressed with improved bounds checking. (CVE-2026-43757)
CVE-2026-43757 is a critical out-of-bounds read vulnerability affecting macOS. The flaw could allow an application to cause unexpected system termination. The issue has been addressed with improved bounds checking and fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read due to insufficient bounds checking in macOS. Exploitation could lead to an application causing unexpected system termination, impacting system availability. The vulnerability is tracked as CWE-125 and has a CVSS 3.1 base score of 9.8, indicating critical severity with network attack vector, low complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The issue is fixed in specific macOS versions: Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6.
Potential Impact
An attacker could cause unexpected system termination, resulting in denial of service and potential disruption of system operations. The vulnerability affects system stability and could impact confidentiality and integrity due to the critical CVSS score, although no specific data leakage or code execution details are provided.
Mitigation Recommendations
The vulnerability is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users and administrators should update to these versions or later to remediate the issue. No further mitigation steps are indicated.
An out-of-bounds read was addressed with improved bounds checking. (CVE-2026-43757)
Description
CVE-2026-43757 is a critical out-of-bounds read vulnerability affecting macOS. The flaw could allow an application to cause unexpected system termination. The issue has been addressed with improved bounds checking and fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read due to insufficient bounds checking in macOS. Exploitation could lead to an application causing unexpected system termination, impacting system availability. The vulnerability is tracked as CWE-125 and has a CVSS 3.1 base score of 9.8, indicating critical severity with network attack vector, low complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. The issue is fixed in specific macOS versions: Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6.
Potential Impact
An attacker could cause unexpected system termination, resulting in denial of service and potential disruption of system operations. The vulnerability affects system stability and could impact confidentiality and integrity due to the critical CVSS score, although no specific data leakage or code execution details are provided.
Mitigation Recommendations
The vulnerability is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users and administrators should update to these versions or later to remediate the issue. No further mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-whqr-78r5-cq67
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43757"]
- Ecosystems
- []
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a83aa79bf8831d539e32451
Added to database: 08/18/2026, 00:42:33 UTC
Last enriched: 08/18/2026, 01:11:16 UTC
Last updated: 08/18/2026, 01:53:04 UTC
Views: 3
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