#VU104548 NULL pointer dereference in Linux kernel - CVE-2022-49271

Vulnerability identifier: #VU104548

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-2022-49271

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 smb2_ioctl_query_info() function in fs/cifs/smb2ops.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.16, 5.16 rc1, 5.16 rc2, 5.16 rc3, 5.16 rc4, 5.16 rc5, 5.16 rc6, 5.16 rc8, 5.16.0, 5.16.1, 5.16.2, 5.16.3, 5.16.4, 5.16.5, 5.16.6, 5.16.7, 5.16.8, 5.16.9, 5.16.10, 5.16.11, 5.16.12, 5.16.13, 5.16.14, 5.16.15, 5.16.16, 5.16.17, 5.16.18

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External links
https://git.kernel.org/stable/c/7529fbee10d82493c5cb109e51788bf74816d1c0
https://git.kernel.org/stable/c/9963ccea6087268e1275b992dca5d0dd4b938765
https://git.kernel.org/stable/c/b92e358757b91c2827af112cae9af513f26a3f34
https://git.kernel.org/stable/c/f143f8334fb9eb2f6c7c15b9da1472d9c965fd84
https://git.kernel.org/stable/c/fadddfc1dc3c6f79b21cff4a7e9a6c40b84fbc53
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.19

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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.