CVE-2026-64016

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

ksmbd: fix durable reconnect error path file lifetime

After a durable reconnect succeeds, ksmbdreopendurable_fd() republishes

the same ksmbdfile into the session volatile-id table. If smb2open()

then takes a later error path, cleanup first calls ksmbdfdput(work, fp)

and then unconditionally calls ksmbdputdurablefd(dhinfo.fp).

In this case fp and dh_info.fp are the same object. The first put drops the

reconnect lookup reference, but the final durable put can run

_ksmbdclose_fd(NULL, fp). Because the final close is not session-aware,

it can free the file object without removing the volatile-id entry that was

just published into the session table.

Use the session-aware put for the final reconnect drop when the reconnect

had already succeeded and the error path is cleaning up the republished

file. Earlier reconnect failures, before fp is assigned to dh_info.fp, keep

using the durable-only put path.