#VU105425 Resource management error in Linux kernel - CVE-2025-21830

Vulnerability identifier: #VU105425

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-2025-21830

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 get_mode_access() function in security/landlock/fs.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/0fde195a373ab1267e60baa9e1a703a97e7464cd
https://git.kernel.org/stable/c/2569e65d2eb6ac1afe6cb6dfae476afee8b6771a
https://git.kernel.org/stable/c/39bb3d56f1c351e76bb18895d0e73796e653d5c1
https://git.kernel.org/stable/c/49440290a0935f428a1e43a5ac8dc275a647ff80
https://git.kernel.org/stable/c/7d6121228959ddf44a4b9b6a177384ac7854e2f9

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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.