#VU90434 NULL pointer dereference in Linux kernel - CVE-2023-52856

Vulnerability identifier: #VU90434

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-2023-52856

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 lt8912_bridge_detach() function in drivers/gpu/drm/bridge/lontium-lt8912b.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
http://git.kernel.org/stable/c/42071feab712ba2a139b8928f7e0f8d3a6fc719e
http://git.kernel.org/stable/c/7bf0cb8f40280a85034990dfe42be8ca8f80f37a
http://git.kernel.org/stable/c/fcd9895e365474709844eeb31cfe53d912c3596e
http://git.kernel.org/stable/c/b65e3249f3ca96e3c736af889461d80d675feab6
http://git.kernel.org/stable/c/44283993144a03af9df31934d6c32bbd42d1a347

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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.