#VU96431 Improper locking in Linux kernel - CVE-2022-48940

Vulnerability identifier: #VU96431

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-2022-48940

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 include/linux/bpf.h. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15, 5.15 rc1, 5.15 rc2, 5.15 rc3, 5.15 rc4, 5.15 rc5, 5.15 rc6, 5.15 rc7, 5.15.0, 5.15.1, 5.15.2, 5.15.3, 5.15.4, 5.15.5, 5.15.6, 5.15.7, 5.15.8, 5.15.9, 5.15.10, 5.15.11, 5.15.12, 5.15.13, 5.15.14, 5.15.15, 5.15.16, 5.15.17, 5.15.18, 5.15.19, 5.15.20, 5.15.21, 5.15.22, 5.15.23, 5.15.24, 5.15.25, 5.16, 5.16 rc1, 5.16 rc2, 5.16 rc3, 5.16 rc4, 5.16 rc5, 5.16 rc6, 5.16 rc8, 5.16.0, 5.16.1, 5.16.2, 5.16.3, 5.16.4, 5.16.5, 5.16.6, 5.16.7, 5.16.8, 5.16.9, 5.16.10, 5.16.11, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12

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External links
https://git.kernel.org/stable/c/719d1c2524c89ada78c4c9202641c1d9e942a322
https://git.kernel.org/stable/c/eca9bd215d2233de79d930fa97aefbce03247a98
https://git.kernel.org/stable/c/a8abb0c3dc1e28454851a00f8b7333d9695d566c
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.26
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17

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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.