Memory leak in Linux kernel nfp flower driver

1) Memory leak

EUVDB-ID: #VU96402

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-2022-48934

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 nfp_tunnel_add_shared_mac() and kfree() functions in drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4 - 5.17 rc12

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.0:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.4.7:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/5ad5886f85b6bd893e3ed19013765fb0c243c069
https://git.kernel.org/stable/c/af4bc921d39dffdb83076e0a7eed1321242b7d87
https://git.kernel.org/stable/c/9d8097caa73200710d52b9f4d9f430548f46a900
https://git.kernel.org/stable/c/4086d2433576baf85f0e538511df97c8101e0a10
https://git.kernel.org/stable/c/3a14d0888eb4b0045884126acc69abfb7b87814d
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.103
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.26
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.182

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.