CVE-2026-86901: Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure in Apple macOS
An out-of-bounds write issue was addressed with improved bounds checking. 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 write 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 enhancing bounds checking in the affected code. The fix is included in macOS Golden Gate 27, making all earlier versions vulnerable.
Potential Impact
Successful exploitation can lead to system crashes or leakage of sensitive kernel memory, potentially exposing sensitive information or destabilizing the system. There is no indication of active exploitation in the wild.
Mitigation Recommendations
Upgrade to macOS Golden Gate 27 or later, where this vulnerability has been fixed with improved bounds checking. No other mitigations are indicated.
CVE-2026-86901: Mounting a maliciously crafted exFAT volume may cause unexpected system termination or kernel memory disclosure in Apple macOS
Description
An out-of-bounds write issue was addressed with improved bounds checking. 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 write 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 enhancing bounds checking in the affected code. The fix is included in macOS Golden Gate 27, making all earlier versions vulnerable.
Potential Impact
Successful exploitation can lead to system crashes or leakage of sensitive kernel memory, potentially exposing sensitive information or destabilizing the system. There is no indication of active exploitation in the wild.
Mitigation Recommendations
Upgrade to macOS Golden Gate 27 or later, where this vulnerability has been fixed with improved bounds checking. No other mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-08T16:43:41.873Z
- State
- PUBLISHED
Threat ID: 6aa8611a55bf5e2cf59d3126
Added to database: 09/14/2026, 21:03:22 UTC
Last enriched: 09/14/2026, 21:17:20 UTC
Last updated: 09/14/2026, 23:09:55 UTC
Views: 4
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