#VU91452 Improper locking in Linux kernel - CVE-2022-48644

Vulnerability identifier: #VU91452

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-2022-48644

CWE-ID: CWE-667

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 improper locking within the taprio_enable_offload() and taprio_disable_offload() functions 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/d12a1eb07003e597077329767c6aa86a7e972c76
https://git.kernel.org/stable/c/586def6ebed195f3594a4884f7c5334d0e1ad1bb
https://git.kernel.org/stable/c/f58e43184226e5e9662088ccf1389e424a3a4cbd
https://git.kernel.org/stable/c/c7c9c7eb305ab8b4e93e4e4e1b78d8cfcbc26323
https://git.kernel.org/stable/c/db46e3a88a09c5cf7e505664d01da7238cd56c92

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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.