#VU100617 Use-after-free in Linux kernel - CVE-2023-52921
Vulnerability identifier: #VU100617
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-2023-52921
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 amdgpu_cs_pass1() function in drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c. A local user can escalate privileges on the system.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 6.1, 6.1 rc1, 6.1 rc3, 6.1 rc7, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.1.7, 6.1.8, 6.1.9, 6.1.10, 6.1.11, 6.1.12, 6.1.13, 6.1.14, 6.1.15, 6.1.16, 6.1.17, 6.1.18, 6.1.19, 6.1.20, 6.1.21, 6.1.22, 6.1.23, 6.1.24, 6.1.25, 6.1.26, 6.1.27, 6.1.28, 6.1.29, 6.1.30, 6.1.31, 6.1.32, 6.1.33, 6.1.34, 6.1.35, 6.1.36, 6.1.37, 6.1.38, 6.1.39, 6.1.40, 6.1.41, 6.1.42, 6.1.43, 6.1.44, 6.1.45, 6.4, 6.4 rc1, 6.4 rc2, 6.4 rc3, 6.4 rc4, 6.4 rc5, 6.4 rc6, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9, 6.4.10, 6.5 rc1, 6.5 rc5, 6.5 rc7
External links
https://git.kernel.org/stable/c/9a2393af1f35d1975204fc00035c64a1c792b278
https://git.kernel.org/stable/c/e08e9dd09809b16f8f8cee8c466841b33d24ed96
https://git.kernel.org/stable/c/90e065677e0362a777b9db97ea21d43a39211399
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.46
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.11
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5
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.
