#VU94437 NULL pointer dereference in Linux kernel - CVE-2022-48850

Vulnerability identifier: #VU94437

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-2022-48850

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 speed_show() function in net/core/net-sysfs.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/a7b9ab04c5932dee7ec95e0abc58b0df350c0dd2
https://git.kernel.org/stable/c/081369ad088a76429984483b8a5f7e967a125aad
https://git.kernel.org/stable/c/75fc8363227a999e8f3d17e2eb28dce5600dcd3f
https://git.kernel.org/stable/c/8879b5313e9fa5e0c6d6812a0d25d83aed0110e2
https://git.kernel.org/stable/c/d15c9f6e3335002fea1c33bc8f71a705fa96976c
https://git.kernel.org/stable/c/8d5e69d8fbf3a35ab4fbe56b8f092802b43f3ef6
https://git.kernel.org/stable/c/3a79f380b3e10edf6caa9aac90163a5d7a282204
https://git.kernel.org/stable/c/4224cfd7fb6523f7a9d1c8bb91bb5df1e38eb624

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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.