#VU73770 NULL pointer dereference in Linux kernel - CVE-2023-23006

Vulnerability identifier: #VU73770

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-2023-23006

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 a NULL pointer dereference error within the mlx5_get_uars_page() function in drivers/net/ethernet/mellanox/mlx5/core/steering/dr_domain.c. A local user can pass specially crafted data to the systen and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.15.13, 5.15.13

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External links
https://github.com/torvalds/linux/commit/6b8b42585886c59a008015083282aae434349094
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.13

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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.