#VU107647 Memory leak in Linux kernel - CVE-2021-47671

Vulnerability identifier: #VU107647

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-2021-47671

CWE-ID: CWE-401

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 memory leak within the es58x_rx_err_msg() function in drivers/net/can/usb/etas_es58x/es58x_core.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/4f389e1276a5389c92cef860c9fde8e1c802a871
https://git.kernel.org/stable/c/7eb0881aec26099089f12ae850aebd93190b1dfe
https://git.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50

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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.