CVE-2026-86900: Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure in Apple macOS
An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27. Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in the handling of exFAT volumes on Apple macOS. When a specially crafted exFAT volume is mounted, it may trigger unexpected system termination (crashes) or disclose kernel memory contents. The flaw was addressed by Apple through improved input validation, and the fix is included starting with macOS Golden Gate 27.
Potential Impact
Successful exploitation can lead to system crashes or leakage of kernel memory, potentially exposing sensitive information from the kernel space. There is no indication of remote code execution or privilege escalation in the provided data. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in macOS Golden Gate 27. Users and administrators should update to this version to remediate the vulnerability. No additional mitigation steps are indicated or required beyond applying the official update.
CVE-2026-86900: Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure in Apple macOS
Description
An out-of-bounds read issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27. Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure.
Affected software
Apple
macOS
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in the handling of exFAT volumes on Apple macOS. When a specially crafted exFAT volume is mounted, it may trigger unexpected system termination (crashes) or disclose kernel memory contents. The flaw was addressed by Apple through improved input validation, and the fix is included starting with macOS Golden Gate 27.
Potential Impact
Successful exploitation can lead to system crashes or leakage of kernel memory, potentially exposing sensitive information from the kernel space. There is no indication of remote code execution or privilege escalation in the provided data. No known exploits in the wild have been reported.
Mitigation Recommendations
A fix is available in macOS Golden Gate 27. Users and administrators should update to this version to remediate the vulnerability. No additional mitigation steps are indicated or required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-08T16:43:41.873Z
- State
- PUBLISHED
Threat ID: 6aa8611a55bf5e2cf59d3125
Added to database: 09/14/2026, 21:03:22 UTC
Last enriched: 09/14/2026, 21:17:23 UTC
Last updated: 09/14/2026, 22:11:22 UTC
Views: 3
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