CVE-2026-43378
Description
A flaw was found in the Linux kernel. Specifically, within the Server Message Block (SMB) server component, a use-after-free vulnerability exists in the smb2_open() function. This issue arises when an opinfo pointer is accessed after its memory has been deallocated, creating a window for potential memory corruption. An attacker could exploit this to cause a denial of service or potentially execute arbitrary code.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
Frequently Asked Questions
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