A buffer overflow was addressed with improved size validation. (CVE-2026-64691)
CVE-2026-64691 is a critical buffer overflow vulnerability in macOS Tahoe that was addressed by improved size validation. The flaw could allow an application to cause unexpected system termination. The issue is fixed in macOS Tahoe version 26.6.
AI Analysis
Technical Summary
This vulnerability involves a buffer overflow due to insufficient size validation, classified under CWE-120. It affects macOS Tahoe and allows an application to trigger unexpected system termination. The issue has been resolved in macOS Tahoe 26.6 by implementing improved size validation to prevent the overflow.
Potential Impact
An attacker could exploit this vulnerability to cause a denial of service by triggering unexpected system termination. The CVSS v3.1 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability, making it a critical severity issue.
Mitigation Recommendations
The vulnerability is fixed in macOS Tahoe 26.6. Users and administrators should update to this version to remediate the issue. No additional mitigation steps are indicated.
A buffer overflow was addressed with improved size validation. (CVE-2026-64691)
Description
CVE-2026-64691 is a critical buffer overflow vulnerability in macOS Tahoe that was addressed by improved size validation. The flaw could allow an application to cause unexpected system termination. The issue is fixed in macOS Tahoe version 26.6.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a buffer overflow due to insufficient size validation, classified under CWE-120. It affects macOS Tahoe and allows an application to trigger unexpected system termination. The issue has been resolved in macOS Tahoe 26.6 by implementing improved size validation to prevent the overflow.
Potential Impact
An attacker could exploit this vulnerability to cause a denial of service by triggering unexpected system termination. The CVSS v3.1 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability, making it a critical severity issue.
Mitigation Recommendations
The vulnerability is fixed in macOS Tahoe 26.6. Users and administrators should update to this version to remediate the issue. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jw76-wr94-p2rj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64691"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a6941fc9c2644c7f86cce77
Added to database: 07/28/2026, 23:57:48 UTC
Last enriched: 07/29/2026, 11:09:37 UTC
Last updated: 09/12/2026, 22:01:35 UTC
Views: 103
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