#VU104651 NULL pointer dereference in Linux kernel - CVE-2021-47647

Vulnerability identifier: #VU104651

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-2021-47647

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 F() and &() functions in drivers/clk/qcom/gcc-ipq8074.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/41e360fa73a4c2f5b78f5ded78a5375b08c206a5
https://git.kernel.org/stable/c/5a5576ad405c3c89fc9afb245c4dcc3e412b0aa9
https://git.kernel.org/stable/c/8b89c9e68a01a19a1dd689a42aa65d545e931899
https://git.kernel.org/stable/c/bf8f5182b8f59309809b41c1d1730ed9ca6134b1
https://git.kernel.org/stable/c/d02b3d4a8c525068bc5cfb4341e0023d8eb82ace

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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.