#VU104545 NULL pointer dereference in Linux kernel - CVE-2022-49257

Vulnerability identifier: #VU104545

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-2022-49257

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 watch_queue_set_size() function in kernel/watch_queue.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/112a2f9b0a8457794095a0450598f150724ec456
https://git.kernel.org/stable/c/5ae75b4ed30322b42abaa75ef1b784addfdb7dc9
https://git.kernel.org/stable/c/695c47cea02b9101e2fc2e7d36d552128592b347
https://git.kernel.org/stable/c/a635415a064e77bcfbf43da413fd9dfe0bbed9cb
https://git.kernel.org/stable/c/b6f5ad3e45d19f9c4ee3e8a2aff829f28d68591d

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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.