NULL pointer dereference in Linux kernel net phy driver



| Updated: 2025-05-21
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-37945
CWE-ID CWE-476
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU109524

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-2025-37945

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the phy_link_change() and mdio_bus_phy_suspend() functions in drivers/net/phy/phy_device.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 - 6.14.2

CPE2.3 External links

https://git.kernel.org/stable/c/54e5d00a8de6c13f6c01a94ed48025e882cd15f7
https://git.kernel.org/stable/c/a6ed6f8ec81b8ca7100dcd9e62bdbc0dff1b2259
https://git.kernel.org/stable/c/bd4037d51d3f6667636a1383e78e48a5b7b60755
https://git.kernel.org/stable/c/fc75ea20ffb452652f0d4033f38fe88d7cfdae35
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.24
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.3


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.



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