#VU104644 NULL pointer dereference in Linux kernel - CVE-2022-49201

Vulnerability identifier: #VU104644

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-2022-49201

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 __ibmvnic_open(), ibmvnic_cleanup(), ibmvnic_tx_scrq_clean_buffer(), ibmvnic_xmit() and netif_carrier_off() functions in drivers/net/ethernet/ibm/ibmvnic.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/1bd58abf595b6cf1ba6dd47ec887c4c009155fc9
https://git.kernel.org/stable/c/4219196d1f662cb10a462eb9e076633a3fc31a15
https://git.kernel.org/stable/c/475f9cce98b63bc145b4efa66fa51175d4cb345f
https://git.kernel.org/stable/c/8507c6ade73cdbbbda5c3d31d67f52f2e1cf03fe

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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.