#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: 6.1 - 6.1.128

---

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
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.129

---

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?