#VU94443 NULL pointer dereference in Linux kernel - CVE-2022-48808

Vulnerability identifier: #VU94443

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-2022-48808

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 EXPORT_SYMBOL_GPL() and dsa_switch_shutdown() functions in net/dsa/dsa2.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/ff45899e732e57088985e3a497b1d9100571c0f5
https://git.kernel.org/stable/c/89b60402d43cdab4387dbbf24afebda5cf092ae7
https://git.kernel.org/stable/c/ee534378f00561207656663d93907583958339ae

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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.