#VU93144 Buffer overflow in Linux kernel - CVE-2023-52731

Vulnerability identifier: #VU93144

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-2023-52731

CWE-ID: CWE-119

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 memory corruption within the __releases() function in drivers/video/fbdev/core/fbmem.c, within the fb_deferred_io_open() and fb_deferred_io_cleanup() functions in drivers/video/fbdev/core/fb_defio.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
https://git.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9
https://git.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149
https://git.kernel.org/stable/c/3efc61d95259956db25347e2a9562c3e54546e20

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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.