Vulnerability identifier: #VU92914

Vulnerability 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-2022-48751

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 smc_stat_fallback(), smc_switch_to_fallback(), smc_listen_decline(), smc_listen_work(), smc_sendmsg(), smc_setsockopt() and smc_getsockopt() functions in net/smc/af_smc.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/38f0bdd548fd2ef5d481b88d8a2bfef968452e34
http://git.kernel.org/stable/c/4284225cd8001e134f5cf533a7cd244bbb654d0f
http://git.kernel.org/stable/c/c0bf3d8a943b6f2e912b7c1de03e2ef28e76f760

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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.