#VU90428 NULL pointer dereference in Linux kernel - CVE-2023-52873

Vulnerability identifier: #VU90428

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52873

CWE-ID: CWE-476

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 perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the clk_mt6779_apmixed_probe() and clk_mt6779_top_probe() functions in drivers/clk/mediatek/clk-mt6779.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4, 5.4.0, 5.4.0 rc6, 5.4.1, 5.4.2, 5.4.3, 5.4.4, 5.4.5, 5.4.6, 5.4.7, 5.4.8, 5.4.9, 5.4.10, 5.4.11, 5.4.12, 5.4.13, 5.4.14, 5.4.15, 5.4.16, 5.4.17, 5.4.18, 5.4.19, 5.4.20, 5.4.21, 5.4.22, 5.4.23, 5.4.24, 5.4.25, 5.4.26, 5.4.27, 5.4.28, 5.4.29, 5.4.30, 5.4.31, 5.4.32, 5.4.33, 5.4.34, 5.4.35, 5.4.36, 5.4.37, 5.4.38, 5.4.39, 5.4.40, 5.4.41, 5.4.42, 5.4.43, 5.4.44, 5.4.45, 5.4.46, 5.4.47, 5.4.48, 5.4.49, 5.4.50, 5.4.51, 5.4.52, 5.4.53, 5.4.54, 5.4.55, 5.4.56, 5.4.57, 5.4.58, 5.4.59, 5.4.60, 5.4.61, 5.4.62, 5.4.63, 5.4.64, 5.4.65, 5.4.66, 5.4.67, 5.4.68, 5.4.69, 5.4.70, 5.4.71, 5.4.72, 5.4.73, 5.4.74, 5.4.75, 5.4.76, 5.4.77, 5.4.78, 5.4.79, 5.4.80, 5.4.81, 5.4.82, 5.4.83, 5.4.84, 5.4.85, 5.4.86, 5.4.87, 5.4.88, 5.4.89, 5.4.90, 5.4.91, 5.4.92, 5.4.93, 5.4.94, 5.4.95, 5.4.96, 5.4.97, 5.4.98, 5.4.99, 5.4.100, 5.4.101, 5.4.102, 5.4.103, 5.4.104, 5.4.105, 5.4.106, 5.4.107, 5.4.108, 5.4.109, 5.4.110, 5.4.111, 5.4.112, 5.4.113, 5.4.114, 5.4.115, 5.4.116, 5.4.117, 5.4.118, 5.4.119, 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External links
https://git.kernel.org/stable/c/fbe466f06d4ea18745da0d57540539b7b36936ae
https://git.kernel.org/stable/c/3994387ba3564976731179c4d4a6d7850ddda71a
https://git.kernel.org/stable/c/ca6d565a2319d69d9766e6ecbb5af827fc4afb2b
https://git.kernel.org/stable/c/df1c4a9efa3f5b6fb5e0ae63890230dbe2190b7e
https://git.kernel.org/stable/c/a90239551abc181687f8c0ba60b276f7d75c141e
https://git.kernel.org/stable/c/f6a7c51cf07a399ec067d39f0a22f1817c5c7d2b
https://git.kernel.org/stable/c/1f57f78fbacf630430bf954e5a84caafdfea30c0
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.201
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.139
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.261
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.63
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.2
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7

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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.