#VU90445 NULL pointer dereference in Linux kernel - CVE-2023-52849

Vulnerability identifier: #VU90445

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-2023-52849

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 cxl_memdev_unregister() function in drivers/cxl/core/memdev.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/20bd0198bebdd706bd4614b3933ef70d7c19618f
http://git.kernel.org/stable/c/7c7371b41a14e86f53e7dbe5baa7b1d3e0ab324b
http://git.kernel.org/stable/c/cad22a757029c3a1985c221a2d4a6491ad4035ae
http://git.kernel.org/stable/c/0ca074f7d788627a4e0b047ca5fbdb5fc567220c
http://git.kernel.org/stable/c/88d3917f82ed4215a2154432c26de1480a61b209

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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.