#VU93280 Resource management error in Linux kernel - CVE-2021-47419

Vulnerability identifier: #VU93280

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-2021-47419

CWE-ID: CWE-399

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 resource management error within the taprio_destroy() function in net/sched/sch_taprio.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/c951c08a5996365aecbc5f1a9bddec3905e1ddfc
https://git.kernel.org/stable/c/3ec73ffeef54596c32aff0e73fe60971b9c8b866
https://git.kernel.org/stable/c/7a1c1af341041221b3acb9d7036cc2b43e0efa75
https://git.kernel.org/stable/c/a56d447f196fa9973c568f54c0d76d5391c3b0c0

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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.