#VU106862 Resource management error in Linux kernel - CVE-2025-21976


| Updated: 2025-05-11

Vulnerability identifier: #VU106862

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-2025-21976

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 hvfb_putmem(), hvfb_ops_damage_area(), hvfb_probe() and hvfb_remove() functions in drivers/video/fbdev/hyperv_fb.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12, 6.12.1, 6.12.2, 6.12.3, 6.12.4, 6.12.5, 6.12.6, 6.12.7, 6.12.8, 6.12.9, 6.12.10, 6.12.11, 6.12.12, 6.12.13, 6.12.14, 6.12.15, 6.12.16, 6.12.17, 6.12.18, 6.12.19, 6.13, 6.13.1, 6.13.2, 6.13.3, 6.13.4, 6.13.5, 6.13.6, 6.13.7


External links
https://git.kernel.org/stable/c/4545e2aa121aea304d33903099c03e29ed4fe50a
https://git.kernel.org/stable/c/a7b583dc99c6cf4a96877017be1d08247e1ef2c7
https://git.kernel.org/stable/c/ea2f45ab0e53b255f72c85ccd99e2b394fc5fceb
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.20
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.8
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14


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.


Latest bulletins with this vulnerability