Input validation error in Linux kernel ext4

1) Input validation error

EUVDB-ID: #VU104725

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-2022-49348

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 __ext4_fill_super() and __ext4_remount() functions in fs/ext4/super.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/55b4dbb29054a05d839562f6d635ce05669b016d
https://git.kernel.org/stable/c/af2f1932743fb52ebcb008ad7ac500d9df0aa796
https://git.kernel.org/stable/c/b99fd73418350dea360da8311e87a6a7b0e15a4c
https://git.kernel.org/stable/c/c878bea3c9d724ddfa05a813f30de3d25a0ba83f
https://git.kernel.org/stable/c/cc5b09cb6dacd4b32640537929ab4ee8fb2b9e04

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.