NULL pointer dereference in Linux kernel en rep driver

1) NULL pointer dereference

EUVDB-ID: #VU92911

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48746

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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 mlx5e_rep_bond_unslave(), mlx5e_rep_changelowerstate_event(), mlx5e_rep_changeupper_event() and mlx5e_rep_esw_bond_netevent() functions in drivers/net/ethernet/mellanox/mlx5/core/en/rep/bond.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

External links

http://git.kernel.org/stable/c/a01ee1b8165f4161459b5ec4e728bc7130fe8cd4
http://git.kernel.org/stable/c/fe70126da6063c29ca161cdec7ad1dae9af836b3
http://git.kernel.org/stable/c/4fad499d7fece448e7230d5e5b92f6d8a073e0bb
http://git.kernel.org/stable/c/ec41332e02bd0acf1f24206867bb6a02f5877a62

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.