Double Free in Linux kernel marvell prestera driver

1) Double Free

EUVDB-ID: #VU90887

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-2021-47564

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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

The vulnerability exists due to a double free error within the prestera_port_bridge_join() function in drivers/net/ethernet/marvell/prestera/prestera_switchdev.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

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/5dca8eff4627315df98feec09fff9dfe3356325e
https://git.kernel.org/stable/c/03e5203d2161a00afe4d97d206d2293e40b2f253
https://git.kernel.org/stable/c/e8d032507cb7912baf1d3e0af54516f823befefd

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.