Memory leak in Linux kernel net dsa driver

1) Memory leak

EUVDB-ID: #VU91651

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-2021-47160

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 mt7530_port_set_vlan_aware() function in drivers/net/dsa/mt7530.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/ae389812733b1b1e8e07fcc238e41db166b5c78d
http://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488
http://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2
http://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e
http://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a

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.