NULL pointer dereference in Linux kernel firmware efi driver

1) NULL pointer dereference

EUVDB-ID: #VU96355

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2022-48879

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 efisubsys_init() and generic_ops_unregister() functions in drivers/firmware/efi/efi.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

CPE2.3

External links

http://git.kernel.org/stable/c/585a0b2b3ae7903c6abee3087d09c69e955a7794
http://git.kernel.org/stable/c/5fcf75a8a4c3e7ee9122d143684083c9faf20452
http://git.kernel.org/stable/c/4ca71bc0e1995d15486cd7b60845602a28399cb5
http://git.kernel.org/stable/c/e2ea55564229e4bea1474af15b111b3a3043b76f
http://git.kernel.org/stable/c/adc96d30f6503d30dc68670c013716f1d9fcc747
http://git.kernel.org/stable/c/703c13fe3c9af557d312f5895ed6a5fda2711104

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.