A memory corruption issue was addressed with improved memory handling. (CVE-2026-39877)
CVE-2026-39877 is a high-severity memory corruption vulnerability in macOS that could allow an application to disclose kernel memory. The issue was addressed by improved memory handling and is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
AI Analysis
Technical Summary
This vulnerability involves a memory corruption flaw classified under CWE-119 that could be exploited by an application to disclose kernel memory. The flaw was mitigated by improved memory handling in the affected macOS versions. The CVSS v3.1 score is 7.8, indicating high severity with impact on confidentiality, integrity, and availability. The vulnerability requires local access with low privileges and user interaction to exploit.
Potential Impact
An attacker with local access and user interaction could exploit this vulnerability to disclose sensitive kernel memory, potentially leading to information disclosure and further system compromise. The vulnerability affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
The vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. Users and administrators should apply these updates to remediate the issue. No additional mitigation steps are indicated.
A memory corruption issue was addressed with improved memory handling. (CVE-2026-39877)
Description
CVE-2026-39877 is a high-severity memory corruption vulnerability in macOS that could allow an application to disclose kernel memory. The issue was addressed by improved memory handling and is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a memory corruption flaw classified under CWE-119 that could be exploited by an application to disclose kernel memory. The flaw was mitigated by improved memory handling in the affected macOS versions. The CVSS v3.1 score is 7.8, indicating high severity with impact on confidentiality, integrity, and availability. The vulnerability requires local access with low privileges and user interaction to exploit.
Potential Impact
An attacker with local access and user interaction could exploit this vulnerability to disclose sensitive kernel memory, potentially leading to information disclosure and further system compromise. The vulnerability affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
The vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. Users and administrators should apply these updates to remediate the issue. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-hvwx-8xwj-pgx8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-39877"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a83aa80bf8831d539e3301b
Added to database: 08/18/2026, 00:42:40 UTC
Last enriched: 08/18/2026, 00:56:49 UTC
Last updated: 08/18/2026, 01:52:25 UTC
Views: 3
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