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Change History

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

tee: amdtee: fix use-after-free vulnerability in amdtee_close_session

There is a potential race condition in amdtee_close_session that may
cause use-after-free in amdtee_open_session. For instance, if a session
has refcount == 1, and one thread tries to free this session via:

    kref_put(&sess->refcount, destroy_session);

the reference count will get decremented, and the next step would be to
call destroy_session(). However

Linux https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116 [No types assigned]

Linux https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce [No types assigned]

Linux https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c [No types assigned]

Linux https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27 [No types assigned]

Linux https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f [No types assigned]