FORTINETVERIFIED
Heap overflow in kernel driver due to missing size validation
Checked 7 Oct 2026. BlackTree preserves the last verified facts if a later source check is temporarily unavailable.
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SECURITY ADVISORYFORTINETVERIFIED
PUBLISHER UPDATE · FORTINET-PRODUCTS-89FF6F00E05934BB
FORTINET-PRODUCTS-89FF6F00E05934BB release notes and known issues
Heap overflow in kernel driver due to missing size validation
Scope: Fortinet products. This update record adds version, fix and known-issue context. Its publication date is not a lifecycle boundary.
Summary
CVSSv3 Score: 7.3 A buffer copy without checking size of input vulnerability [CWE-120] in FortiClient Windows may allow an unauthenticated attacker in a position to alter or craft DNS responses to the targeted host to execute arbitrary code via malicious packets. Revised on 2026-08-12 00:00:00
Improvements and security content
- CVSSv3 Score: 7.3 A buffer copy without checking size of input vulnerability [CWE-120] in FortiClient Windows may allow an unauthenticated attacker in a position to alter or craft DNS responses to the targeted host to execute arbitrary code via malicious packets. Revised on 2026-08-12 00:00:00
Known issues
Publisher statementNot stated. The verified publisher record does not contain a known-issues statement.
Affected products and versions
Products
- Fortinet products
Affected versions
- 7.3
Fixed versions or updates
- No fixed version is stated in this record.
Recommended action
Review the official publisher document before deployment.