An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-84505)
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to gain root privileges.
AI Analysis
Technical Summary
CVE-2026-84505 describes an out-of-bounds write vulnerability in macOS that could be exploited by a local application to escalate privileges to root. The vulnerability was mitigated by implementing improved bounds checking. The fix is included in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction required.
Potential Impact
A local application with limited privileges could exploit this vulnerability to write outside the intended memory bounds, potentially leading to privilege escalation to root. This could compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
Apply the official patches by upgrading to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is confirmed by the vendor advisory.
An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2026-84505)
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to gain root privileges.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84505 describes an out-of-bounds write vulnerability in macOS that could be exploited by a local application to escalate privileges to root. The vulnerability was mitigated by implementing improved bounds checking. The fix is included in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction required.
Potential Impact
A local application with limited privileges could exploit this vulnerability to write outside the intended memory bounds, potentially leading to privilege escalation to root. This could compromise system confidentiality, integrity, and availability.
Mitigation Recommendations
Apply the official patches by upgrading to macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is confirmed by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-85f4-mm6j-54x7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-84505"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa8a16455bf5e2cf5f3b7b1
Added to database: 09/15/2026, 01:37:40 UTC
Last enriched: 09/15/2026, 01:42:15 UTC
Last updated: 09/15/2026, 03:01:23 UTC
Views: 2
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