Improper locking in Linux kernel ext4

1) Improper locking

EUVDB-ID: #VU92033

Risk: Low

CVSSv3.1: 4.8 [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-2022-48631

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to improper locking within the __ext4_ext_check() function in fs/ext4/extents.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/bb7eb3ca4b3b0d2c7872cf1a41c30f5e5bd65df0
http://git.kernel.org/stable/c/958b0ee23f5ac106e7cc11472b71aa2ea9a033bc
http://git.kernel.org/stable/c/be4df018c0be5ebecf1ca510feacc23be415cefc
http://git.kernel.org/stable/c/2f5e9de15e4f55fbf56f22d4a2ce406246cc462d
http://git.kernel.org/stable/c/29a5b8a137ac8eb410cc823653a29ac0e7b7e1b0

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.