Out-of-bounds read in Linux kernel sched

1) Out-of-bounds read

EUVDB-ID: #VU90353

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-2021-47044

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to an out-of-bounds read error within the detach_tasks() function in kernel/sched/fair.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/80862cbf76c2646f709a57c4517aefe0b094c774
http://git.kernel.org/stable/c/2f3eab368e313dba35fc2f51ede778bf7b030b54
http://git.kernel.org/stable/c/805cea93e66ca7deaaf6ad3b67224ce47c104c2f
http://git.kernel.org/stable/c/39a2a6eb5c9b66ea7c8055026303b3aa681b49a5

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.