CVE-2026-89636 — smb: client: clear ce->tgthint in free_tgts()

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

smb: client: clear ce->tgthint in free_tgts()

When free_tgts() frees all structures in ce->tlist, ce->tgthint is left pointing to one of the freed cache_dfs_tgt structures.

If ce->tgthint is not reset before it is used later, it results in a use-after-free.

Set ce->tgthint to NULL in free_tgts() after the elements are freed to reflect that no elements remain.

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