CVE - CVE-2023-52503

CVE-ID
CVE-2023-52503	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116 URL:https://git.kernel.org/stable/c/1680c82929bc14d706065f123dab77f2f1293116 MISC:https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce URL:https://git.kernel.org/stable/c/1c95574350cd63bc3c5c2fa06658010768f2a0ce MISC:https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c URL:https://git.kernel.org/stable/c/60c3e7a00db954947c265b55099c21b216f2a05c MISC:https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27 URL:https://git.kernel.org/stable/c/da7ce52a2f6c468946195b116615297d3d113a27 MISC:https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f URL:https://git.kernel.org/stable/c/f4384b3e54ea813868bb81a861bf5b2406e15d8f
Assigning CNA
kernel.org
Date Record Created
20240220	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240220)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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