Memory leak in Linux kernel comedi driver

1) Memory leak

EUVDB-ID: #VU89964

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47364

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the compat_insnlist() function in drivers/staging/comedi/comedi_fops.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

CPE2.3

External links

http://git.kernel.org/stable/c/8d6a21e4cd6a319b0662cbe4ad6199e276ac776a
http://git.kernel.org/stable/c/f217b6c1e28ed0b353634ce4d92a155b80bd1671
http://git.kernel.org/stable/c/bb509a6ffed2c8b0950f637ab5779aa818ed1596

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.