CVE-2026-39877: An app may be able to disclose kernel memory in Apple iOS and iPadOS
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to disclose kernel memory.
AI Analysis
Technical Summary
CVE-2026-39877 is a memory corruption vulnerability in Apple macOS that may allow an application to disclose kernel memory. The issue was mitigated by improved memory handling and is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. The vulnerability is classified under CWE-119 (improper restriction of operations within the bounds of a memory buffer). The CVSS v3.1 score is 7.8, indicating high severity, with attack vector local, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with local access and the ability to execute an application with user interaction could exploit this vulnerability to disclose sensitive kernel memory contents. This could lead to information disclosure and potentially further system compromise due to the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
This vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. Users and administrators should update to these or later versions to remediate the issue. Patch status is confirmed by the vendor advisory indicating an official fix is available.
CVE-2026-39877: An app may be able to disclose kernel memory in Apple iOS and iPadOS
Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to disclose kernel memory.
CVSS v3.1
Score 7.8high
Affected software
Apple
iOS and iPadOS
Apple
macOS
Apple
tvOS
Apple
visionOS
Apple
watchOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-39877 is a memory corruption vulnerability in Apple macOS that may allow an application to disclose kernel memory. The issue was mitigated by improved memory handling and is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. The vulnerability is classified under CWE-119 (improper restriction of operations within the bounds of a memory buffer). The CVSS v3.1 score is 7.8, indicating high severity, with attack vector local, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
An attacker with local access and the ability to execute an application with user interaction could exploit this vulnerability to disclose sensitive kernel memory contents. This could lead to information disclosure and potentially further system compromise due to the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
This vulnerability is fixed in macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. Users and administrators should update to these or later versions to remediate the issue. Patch status is confirmed by the vendor advisory indicating an official fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-04-07T19:58:20.174Z
- State
- PUBLISHED
Threat ID: 6a67c1b29c2644c7f8cb0dbb
Added to database: 07/27/2026, 20:38:10 UTC
Last enriched: 07/29/2026, 23:52:17 UTC
Last updated: 09/10/2026, 20:02:17 UTC
Views: 52
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