#VU90582 NULL pointer dereference in Linux kernel - CVE-2021-47202

Vulnerability identifier: #VU90582

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-2021-47202

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 of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend() and of_thermal_set_trip_temp() functions in drivers/thermal/of-thermal.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/828f4c31684da94ecf0b44a2cbd35bbede04f0bd
https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccac
https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86
https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28e
https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195

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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.