CVE-2026-43764: An app may be able to cause unexpected system termination in Apple macOS
An integer overflow was addressed with improved input validation. 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 involves an integer overflow in Apple macOS that could be triggered by a malicious application to cause unexpected system termination. The root cause was insufficient input validation leading to the overflow condition. Apple fixed the issue by improving input validation in specific macOS versions: Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. The CVSS 3.1 base score of 9.8 reflects the vulnerability's critical impact, including network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker could exploit this vulnerability to cause a denial of service by triggering an unexpected system termination on affected macOS versions. The CVSS score indicates that the impact extends to confidentiality and integrity, though the primary described effect is system termination.
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. Patch status is confirmed by the vendor advisory indicating these fixed versions. No additional mitigation steps are indicated.
CVE-2026-43764: An app may be able to cause unexpected system termination in Apple macOS
Description
An integer overflow was addressed with improved input validation. 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
Apple
macOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow in Apple macOS that could be triggered by a malicious application to cause unexpected system termination. The root cause was insufficient input validation leading to the overflow condition. Apple fixed the issue by improving input validation in specific macOS versions: Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. The CVSS 3.1 base score of 9.8 reflects the vulnerability's critical impact, including network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker could exploit this vulnerability to cause a denial of service by triggering an unexpected system termination on affected macOS versions. The CVSS score indicates that the impact extends to confidentiality and integrity, though the primary described effect is system termination.
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. Patch status is confirmed by the vendor advisory indicating these fixed versions. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:27.817Z
- State
- PUBLISHED
Threat ID: 6a67c1b89c2644c7f8cb0f35
Added to database: 07/27/2026, 20:38:16 UTC
Last enriched: 07/29/2026, 23:44:47 UTC
Last updated: 09/11/2026, 22:06:33 UTC
Views: 48
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