An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-43748)
CVE-2026-43748 is an out-of-bounds write vulnerability that was addressed by improving bounds checking in macOS. The flaw could allow an application to cause unexpected system termination. The issue is fixed in macOS Sequoia 15.7.8 and macOS Tahoe 26.6. This vulnerability has a critical severity rating due to its potential impact on system stability and security.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-43748) involves an out-of-bounds write condition in macOS, classified under CWE-787. The issue was mitigated by enhanced bounds checking to prevent memory corruption. Exploitation could lead to an application causing unexpected system termination, impacting confidentiality, integrity, and availability with a CVSS 3.1 vector indicating network attack vector, low attack complexity, no privileges or user interaction required, and high impact on all security metrics. The vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Tahoe 26.6.
Potential Impact
An attacker could exploit this vulnerability to cause unexpected system termination, potentially leading to denial of service and compromising system stability. The CVSS vector indicates high impact on confidentiality, integrity, and availability, meaning the vulnerability could allow significant unauthorized control or disruption.
Mitigation Recommendations
The vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Tahoe 26.6. Users and administrators should apply these updates to remediate the issue. No other mitigation guidance is provided or necessary as the fix is official and available.
An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-43748)
Description
CVE-2026-43748 is an out-of-bounds write vulnerability that was addressed by improving bounds checking in macOS. The flaw could allow an application to cause unexpected system termination. The issue is fixed in macOS Sequoia 15.7.8 and macOS Tahoe 26.6. This vulnerability has a critical severity rating due to its potential impact on system stability and security.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-43748) involves an out-of-bounds write condition in macOS, classified under CWE-787. The issue was mitigated by enhanced bounds checking to prevent memory corruption. Exploitation could lead to an application causing unexpected system termination, impacting confidentiality, integrity, and availability with a CVSS 3.1 vector indicating network attack vector, low attack complexity, no privileges or user interaction required, and high impact on all security metrics. The vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Tahoe 26.6.
Potential Impact
An attacker could exploit this vulnerability to cause unexpected system termination, potentially leading to denial of service and compromising system stability. The CVSS vector indicates high impact on confidentiality, integrity, and availability, meaning the vulnerability could allow significant unauthorized control or disruption.
Mitigation Recommendations
The vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Tahoe 26.6. Users and administrators should apply these updates to remediate the issue. No other mitigation guidance is provided or necessary as the fix is official and available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-mph6-9jcc-qx8c
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-43748"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a6942029c2644c7f86ce43a
Added to database: 07/28/2026, 23:57:54 UTC
Last enriched: 07/29/2026, 10:53:13 UTC
Last updated: 09/11/2026, 22:08:24 UTC
Views: 181
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