#VU104628 NULL pointer dereference in Linux kernel - CVE-2022-49090

Vulnerability identifier: #VU104628

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-2022-49090

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 secondary_start_kernel() function in arch/arm64/kernel/smp.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/5524cbb1bfcdff0cad0aaa9f94e6092002a07259
https://git.kernel.org/stable/c/790c1567582bda8f1153015436e3330a7c6eb278
https://git.kernel.org/stable/c/87f5d66daa5f457449bb95d6b8d18bb7596aa627
https://git.kernel.org/stable/c/c78a1b2d0bff678570c8dc9f14035606f5e5257d

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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.