Input validation error in Linux kernel sched

1) Input validation error

EUVDB-ID: #VU94124

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-2021-47293

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 tcf_skbmod_act() function in net/sched/act_skbmod.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

External links

http://git.kernel.org/stable/c/e4fdca366806f6bab374d1a95e626a10a3854b0c
http://git.kernel.org/stable/c/a88414fb1117f2fe65fb88e45ba694e1d09d5024
http://git.kernel.org/stable/c/071729150be9e1d1b851b70efb6d91ee9269d57b
http://git.kernel.org/stable/c/34f1e1f657fae2891b485a3b2b95fe4d2aef9f0d
http://git.kernel.org/stable/c/727d6a8b7ef3d25080fad228b2c4a1d4da5999c6

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.