An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-43802)
CVE-2026-43802 is a critical out-of-bounds write vulnerability in macOS that was addressed by improved bounds checking. The flaw could allow an application to cause unexpected system termination. The issue is 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 write condition that was remediated by enhancing bounds checking mechanisms. It affects macOS operating systems and could be exploited by an application to cause unexpected system termination, impacting system availability. The vulnerability is identified as CWE-787 and has a CVSS v3.1 base score of 9.8, indicating critical severity with network attack vector, low attack 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 exploit this vulnerability to cause unexpected system termination, resulting in denial of service and potential disruption of normal system operations. The high CVSS score reflects the critical nature of the impact on confidentiality, integrity, and availability.
Mitigation Recommendations
The vulnerability has been addressed with an official fix 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.
An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-43802)
Description
CVE-2026-43802 is a critical out-of-bounds write vulnerability in macOS that was addressed by improved bounds checking. The flaw could allow an application to cause unexpected system termination. The issue is 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 write condition that was remediated by enhancing bounds checking mechanisms. It affects macOS operating systems and could be exploited by an application to cause unexpected system termination, impacting system availability. The vulnerability is identified as CWE-787 and has a CVSS v3.1 base score of 9.8, indicating critical severity with network attack vector, low attack 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 exploit this vulnerability to cause unexpected system termination, resulting in denial of service and potential disruption of normal system operations. The high CVSS score reflects the critical nature of the impact on confidentiality, integrity, and availability.
Mitigation Recommendations
The vulnerability has been addressed with an official fix 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.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jhhw-w49f-ccpw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43802"]
- Ecosystems
- []
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a83aa7abf8831d539e326f9
Added to database: 08/18/2026, 00:42:34 UTC
Last enriched: 08/18/2026, 00:58:33 UTC
Last updated: 08/18/2026, 03:15:23 UTC
Views: 4
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