An out-of-bounds read was addressed with improved bounds checking. (CVE-2026-43809)
An out-of-bounds read 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. An app may be able to cause unexpected system termination.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-43809) is an out-of-bounds read caused by inadequate bounds checking in certain versions of macOS. Exploitation may lead to unexpected system termination, impacting system availability. The vulnerability is addressed by improved bounds checking in the specified macOS versions.
Potential Impact
An attacker could exploit this vulnerability to cause unexpected system termination, resulting in denial of service. The CVSS vector indicates network attack vector, low attack complexity, no privileges or user interaction required, with high confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Apply the official fixes by updating to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6. These updates include improved bounds checking that addresses the out-of-bounds read vulnerability.
An out-of-bounds read was addressed with improved bounds checking. (CVE-2026-43809)
Description
An out-of-bounds read 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. An app may be able to cause unexpected system termination.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-43809) is an out-of-bounds read caused by inadequate bounds checking in certain versions of macOS. Exploitation may lead to unexpected system termination, impacting system availability. The vulnerability is addressed by improved bounds checking in the specified macOS versions.
Potential Impact
An attacker could exploit this vulnerability to cause unexpected system termination, resulting in denial of service. The CVSS vector indicates network attack vector, low attack complexity, no privileges or user interaction required, with high confidentiality, integrity, and availability impacts.
Mitigation Recommendations
Apply the official fixes by updating to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6. These updates include improved bounds checking that addresses the out-of-bounds read vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-g7x9-qq7j-x3gx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43809"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a6941fe9c2644c7f86cdda5
Added to database: 07/28/2026, 23:57:50 UTC
Last enriched: 07/29/2026, 11:08:10 UTC
Last updated: 09/10/2026, 20:01:57 UTC
Views: 100
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