#VU90353 Out-of-bounds read in Linux kernel - CVE-2021-47044

Vulnerability identifier: #VU90353

Vulnerability 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-2021-47044

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

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External links
https://git.kernel.org/stable/c/80862cbf76c2646f709a57c4517aefe0b094c774
https://git.kernel.org/stable/c/2f3eab368e313dba35fc2f51ede778bf7b030b54
https://git.kernel.org/stable/c/805cea93e66ca7deaaf6ad3b67224ce47c104c2f
https://git.kernel.org/stable/c/39a2a6eb5c9b66ea7c8055026303b3aa681b49a5

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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.