Improper error handling in Linux kernel extcon driver

1) Improper error handling

EUVDB-ID: #VU104753

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-2022-49308

CWE-ID: CWE-388 - Error Handling

Exploit availability: No

Description

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

The vulnerability exists due to improper error handling within the extcon_dev_register() and extcon_dev_unregister() functions in drivers/extcon/extcon.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 - 5.4.197

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/033ec4e7e59ae5e1ef1e8c10bc6552926044ed1c
https://git.kernel.org/stable/c/35ff1ac55d301efb3f467cf5426faaeb3452994b
https://git.kernel.org/stable/c/368e68ad6da4317fc4170e8d92b51c13d1bfe7a7
https://git.kernel.org/stable/c/5dcc2afe716d69f5112ce035cb14f007461ff189
https://git.kernel.org/stable/c/6e721f3ad0535b24f19a62420f4da95212cf069c
https://git.kernel.org/stable/c/abf3b222614f49f98e606fccdd269161c0d70204
https://git.kernel.org/stable/c/cb81ea998c461868d1168411a867d8ffee12f23f
https://git.kernel.org/stable/c/d472c78cc82999d07bd09193a6718016ce9cd386
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.198

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.