CVE-2026-64694: 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 exploited by an application to cause unexpected system termination, potentially leading to denial of service. The flaw was mitigated by improving input validation. The fix is included in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. The CVSS 3.1 base score of 9.8 reflects network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker could exploit this integer overflow vulnerability to cause the affected macOS system to terminate unexpectedly, resulting in denial of service. The CVSS score of 9.8 indicates critical impact affecting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
A fix for this vulnerability is available 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 versions contain the fix.
CVE-2026-64694: 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 exploited by an application to cause unexpected system termination, potentially leading to denial of service. The flaw was mitigated by improving input validation. The fix is included in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. The CVSS 3.1 base score of 9.8 reflects network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker could exploit this integer overflow vulnerability to cause the affected macOS system to terminate unexpectedly, resulting in denial of service. The CVSS score of 9.8 indicates critical impact affecting confidentiality, integrity, and availability of the system.
Mitigation Recommendations
A fix for this vulnerability is available 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 versions contain the fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-07-20T18:09:01.158Z
- State
- PUBLISHED
Threat ID: 6a67c1bf9c2644c7f8cb12a6
Added to database: 07/27/2026, 20:38:23 UTC
Last enriched: 07/29/2026, 23:47:57 UTC
Last updated: 09/11/2026, 22:06:34 UTC
Views: 52
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