Input validation error in Linux kernel nfsd

1) Input validation error

EUVDB-ID: #VU94492

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2022-48829

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation within the svcxdr_decode_sattr3() function in fs/nfsd/nfs3xdr.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

External links

http://git.kernel.org/stable/c/a231ae6bb50e7c0a9e9efd7b0d10687f1d71b3a3
http://git.kernel.org/stable/c/37f2d2cd8eadddbbd9c7bda327a9393399b2f89b
http://git.kernel.org/stable/c/aa9051ddb4b378bd22e72a67bc77b9fc1482c5f0
http://git.kernel.org/stable/c/a648fdeb7c0e17177a2280344d015dba3fbe3314

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.