CVE-2026-64141
Description
A flaw was found in the ksmbd component of the Linux kernel. A remote attacker can trigger a null pointer dereference by negotiating a new session with a specific client identifier (ClientGuid) and issuing a Server Message Block (SMB2) CREATE request with a lease context on a different inode after a durable-handle session teardown. This can lead to a kernel panic, resulting in a denial of service (DoS).
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart
NULL pointer dereferences usually result in the failure of the process unless exception handling (on some platforms) is available and implemented. Even when exception handling is being used, it can still be very difficult to return the software to a safe state of operation.
Integrity,Confidentiality
Technical Impact: Execute Unauthorized Code or Commands; Read Memory; Modify Memory
In rare circumstances, when NULL is equivalent to the 0x0 memory address and privileged code can access it, then writing or reading memory is possible, which may lead to code execution.
Frequently Asked Questions
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