Description (CNA)
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, if in another thread, amdtee_open_session() is called before destroy_session() has completed execution, alloc_session() may return 'sess' that will be freed up later in destroy_session() leading to use-after-free in amdtee_open_session. To fix this issue, treat decrement of sess->refcount and removal of 'sess' from session list in destroy_session() as a critical section, so that it is executed atomically.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 before da7ce52a2f6c468946195b116615297d3d113a27; affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 before 1680c82929bc14d706065f123dab77f2f1293116; affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 before 60c3e7a00db954947c265b55099c21b216f2a05c; affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 before 1c95574350cd63bc3c5c2fa06658010768f2a0ce; affected 757cc3e9ff1d72d014096399d6e2bf03974d9da1 before f4384b3e54ea813868bb81a861bf5b2406e15d8f |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.10.199 through 5.10.*; unaffected 5.15.136 through 5.15.*; unaffected 6.1.59 through 6.1.*; unaffected 6.5.8 through 6.5.*; unaffected 6.6 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27
- https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116
- https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c
- https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce
- https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27
- https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116
- https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c
- https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce
- https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f
No English description supplied.
No references supplied.