#VU96353 NULL pointer dereference in Linux kernel - CVE-2022-48884

Vulnerability identifier: #VU96353

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-2022-48884

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 mlx5_cmd_init(), dma_pool_destroy() and mlx5_cmd_cleanup() functions in drivers/net/ethernet/mellanox/mlx5/core/cmd.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1, 6.1 rc1, 6.1 rc3, 6.1 rc7, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.2 rc5, 6.2 rc7

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External links
https://git.kernel.org/stable/c/ddf458641a511e7dff19f3bf0cbbc5dd9fe08ce5
https://git.kernel.org/stable/c/da2e552b469a0cd130ff70a88ccc4139da428a65
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.7
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2

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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.