CVE-2026-84536: Connecting to a malicious SMB server may lead to unexpected system termination in Apple macOS
CVE-2026-84536 is a vulnerability in Apple macOS where connecting to a malicious SMB server may cause unexpected system termination due to an integer underflow. The issue has been fixed in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. This vulnerability affects versions prior to these fixed releases.
AI Analysis
Technical Summary
This vulnerability involves an integer underflow in the SMB client implementation of Apple macOS. When a user connects to a malicious SMB server, the improper input validation can trigger an integer underflow, leading to unexpected system termination (crash). Apple addressed this issue by improving input validation in the specified macOS versions.
Potential Impact
Successful exploitation of this vulnerability may cause the affected macOS system to terminate unexpectedly, resulting in a denial of service condition. There is no indication of code execution or data compromise from the provided information.
Mitigation Recommendations
Apple has released fixes for this vulnerability in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are indicated.
CVE-2026-84536: Connecting to a malicious SMB server may lead to unexpected system termination in Apple macOS
Description
CVE-2026-84536 is a vulnerability in Apple macOS where connecting to a malicious SMB server may cause unexpected system termination due to an integer underflow. The issue has been fixed in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. This vulnerability affects versions prior to these fixed releases.
Affected software
Apple
macOS
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer underflow in the SMB client implementation of Apple macOS. When a user connects to a malicious SMB server, the improper input validation can trigger an integer underflow, leading to unexpected system termination (crash). Apple addressed this issue by improving input validation in the specified macOS versions.
Potential Impact
Successful exploitation of this vulnerability may cause the affected macOS system to terminate unexpectedly, resulting in a denial of service condition. There is no indication of code execution or data compromise from the provided information.
Mitigation Recommendations
Apple has released fixes for this vulnerability in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-01T21:13:17.750Z
- State
- PUBLISHED
Threat ID: 6aa8610655bf5e2cf59d2983
Added to database: 09/14/2026, 21:03:02 UTC
Last enriched: 09/14/2026, 22:31:42 UTC
Last updated: 09/15/2026, 01:46:45 UTC
Views: 3
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