Out-of-bounds read in Linux kernel net usb driver

1) Out-of-bounds read

EUVDB-ID: #VU104977

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-2025-21741

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to an out-of-bounds read error within the ipheth_rcvbulk_callback_ncm() function in drivers/net/usb/ipheth.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

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/22475242ddb70e35c9148234be9a3aa9fb8efff9
https://git.kernel.org/stable/c/5835bf66c50ac2b85ed28b282c2456c3516ef0a6
https://git.kernel.org/stable/c/971b8c572559e52d32a2b82f2d9e0685439a0117
https://git.kernel.org/stable/c/ee591f2b281721171896117f9946fced31441418

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.