#VU90234 Use-after-free in Linux kernel - CVE-2023-52503

Vulnerability identifier: #VU90234

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52503

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the destroy_session(), amdtee_open_session() and amdtee_close_session() functions in drivers/tee/amdtee/core.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
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

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.