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CVE-2026-64704 is a type confusion vulnerability in Apple SMBClient’s SMB2 CREATE reply parsing. The flaw occurs because the parser in smb2_smb_parse_create_contexts trusts the server-supplied create-context name in the response and does not verify that the returned context type matches the type originally requested by the client. In the described attack scenario, the client sends a Resolve ID create context, but a malicious SMB server replies with a lease context instead. The parser then enters the lease-handling path and reinterprets a Resolve ID structure as a lease-related structure, causing attacker-controlled fields to be treated as pointers or other incompatible data types in kernel memory. This can lead to arbitrary kernel pointer read or dereference behavior and may result in unexpected system termination. Research cited in the available material further indicates the flaw was used as part of a kernel exploit chain on macOS 26.4.1.
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A type confusion vulnerability in macOS SMBClient that allows a malicious SMB server to trigger arbitrary kernel pointer read/dereference, forming part of an Apple MIE bypass exploit chain.
A type confusion vulnerability in Apple's SMB client parsing of SMB2 CREATE contexts, where a malicious SMB server can cause a Resolve ID context to be reinterpreted as a lease structure, enabling attacker-influenced pointer dereference and contributing to kernel read/write and code execution.
An SMB type-confusion vulnerability in Apple products.
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Cross-references every affected SKU, including bundled OEM variants.
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