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This bug fix is based on the following commit "NetworkPkg TcpDxe: SECURITY PATCH" REF: 1904a64 Issue Description: An "Invalid handle" error was detected during runtime when attempting to destroy a child instance of the hashing protocol. The problematic code segment was: NetworkPkg\TcpDxe\TcpDriver.c Status = Hash2ServiceBinding->DestroyChild(Hash2ServiceBinding, &mHash2ServiceHandle); Root Cause Analysis: The root cause of the error was the passing of an incorrect parameter type, a pointer to an EFI_HANDLE instead of an EFI_HANDLE itself, to the DestroyChild function. This mismatch resulted in the function receiving an invalid handle. Implemented Solution: To resolve this issue, the function call was corrected to pass mHash2ServiceHandle directly: NetworkPkg\TcpDxe\TcpDriver.c Status = Hash2ServiceBinding->DestroyChild(Hash2ServiceBinding, mHash2ServiceHandle); This modification ensures the correct handle type is used, effectively rectifying the "Invalid handle" error. Verification: Testing has been conducted, confirming the efficacy of the fix. Additionally, the BIOS can boot into the OS in an iPXE environment. Cc: Doug Flick [MSFT] <doug.edk2@gmail.com> Signed-off-by: Sam Tsai [Wiwynn] <sam_tsai@wiwynn.com> Reviewed-by: Saloni Kasbekar <saloni.kasbekar@intel.com>