#VU95507 Improper locking in Linux kernel - CVE-2024-42239

Vulnerability identifier: #VU95507

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-2024-42239

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 __bpf_async_init(), drop_prog_refcnt(), BPF_CALL_1() and hrtimer_cancel() functions in kernel/bpf/helpers.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/9369830518688ecd5b08ffc08ab3302ce2b5d0f7
https://git.kernel.org/stable/c/3e4e8178a8666c56813bd167b848fca0f4c9af0a
https://git.kernel.org/stable/c/d4523831f07a267a943f0dde844bf8ead7495f13

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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.