#VU98998 Improper locking in Linux kernel - CVE-2024-50043

Vulnerability identifier: #VU98998

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-2024-50043

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 nfsd4_free_stateid() function in fs/nfsd/nfs4state.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.11, 6.11.1, 6.11.2, 6.11.3

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External links
https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039
https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.11.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12

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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.