CVE-2025-68312

usbnet: Prevents free active kevent

State: Published
Severity: Not scored
Published: Dec 16, 2025
Updated: Jun 16, 2026
Reserved: Dec 16, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

usbnet: Prevents free active kevent

The root cause of this issue are: 1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0); put the kevent work in global workqueue. However, the kevent has not yet been scheduled when the usbnet device is unregistered. Therefore, executing free_netdev() results in the "free active object (kevent)" error reported here.

2. Another factor is that when calling usbnet_disconnect()->unregister_netdev(), if the usbnet device is up, ndo_stop() is executed to cancel the kevent. However, because the device is not up, ndo_stop() is not executed.

The solution to this problem is to cancel the kevent before executing free_netdev().

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8b4588b8b00b299be16a35be67b331d8fdba03f3 to before 285d4b953f2ca03c358f986718dd89ee9bde632eAffected 135199a2edd459d2b123144efcd7f9bcd95128e4 to before 88a38b135d69f5db9024ff6527232f1b51be8915Affected 635fd8953e4309b54ca6a81bed1d4a87668694f4 to before 43005002b60ef3424719ecda16d124714b45da3bAffected a69e617e533edddf3fa3123149900f36e0a6dc74 to before 3a10619fdefd3051aeb14860e4d4335529b4e94dAffected a69e617e533edddf3fa3123149900f36e0a6dc74 to before 9a579d6a39513069d298eee70770bbac8a148565Affected a69e617e533edddf3fa3123149900f36e0a6dc74 to before 2ce1de32e05445d77fc056f6ff8339cfb78a5f84Affected a69e617e533edddf3fa3123149900f36e0a6dc74 to before 5158fb8da162e3982940f30cd01ed77bdf42c6fcAffected a69e617e533edddf3fa3123149900f36e0a6dc74 to before 420c84c330d1688b8c764479e5738bbdbf0a33deAffected d2d6b530d89b0a912148018027386aa049f0a309Affected e2a521a7dcc463c5017b4426ca0804e151faeff7Affected 7f77dcbc030c2faa6d8e8a594985eeb34018409eAffected d49bb8cf9bfaa06aa527eb30f1a52a071da2e32fAffected db3b738ae5f726204876f4303c49cfdf4311403fAffected 5.4.211 to before 5.4.302Affected 5.10.137 to before 5.10.247Affected 5.15.61 to before 5.15.197Affected 4.9.326 to before 4.10Affected 4.14.291 to before 4.15Affected 4.19.256 to before 4.20Affected 5.18.18 to before 5.19Affected 5.19.2 to before 5.20Affected
LinuxLinux	6.0Affected before 6.0Not affected 5.4.302 through 5.4.Not affected 5.10.247 through 5.10.Not affected 5.15.197 through 5.15.Not affected 6.1.159 through 6.1.Not affected 6.6.117 through 6.6.Not affected 6.12.58 through 6.12.Not affected 6.17.8 through 6.17.*Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

8b4588b8b00b299be16a35be67b331d8fdba03f3 to before 285d4b953f2ca03c358f986718dd89ee9bde632eAffected
135199a2edd459d2b123144efcd7f9bcd95128e4 to before 88a38b135d69f5db9024ff6527232f1b51be8915Affected
635fd8953e4309b54ca6a81bed1d4a87668694f4 to before 43005002b60ef3424719ecda16d124714b45da3bAffected
a69e617e533edddf3fa3123149900f36e0a6dc74 to before 3a10619fdefd3051aeb14860e4d4335529b4e94dAffected
a69e617e533edddf3fa3123149900f36e0a6dc74 to before 9a579d6a39513069d298eee70770bbac8a148565Affected
a69e617e533edddf3fa3123149900f36e0a6dc74 to before 2ce1de32e05445d77fc056f6ff8339cfb78a5f84Affected
a69e617e533edddf3fa3123149900f36e0a6dc74 to before 5158fb8da162e3982940f30cd01ed77bdf42c6fcAffected
a69e617e533edddf3fa3123149900f36e0a6dc74 to before 420c84c330d1688b8c764479e5738bbdbf0a33deAffected
d2d6b530d89b0a912148018027386aa049f0a309Affected
e2a521a7dcc463c5017b4426ca0804e151faeff7Affected
7f77dcbc030c2faa6d8e8a594985eeb34018409eAffected
d49bb8cf9bfaa06aa527eb30f1a52a071da2e32fAffected
db3b738ae5f726204876f4303c49cfdf4311403fAffected
5.4.211 to before 5.4.302Affected
5.10.137 to before 5.10.247Affected
5.15.61 to before 5.15.197Affected
4.9.326 to before 4.10Affected
4.14.291 to before 4.15Affected
4.19.256 to before 4.20Affected
5.18.18 to before 5.19Affected
5.19.2 to before 5.20Affected

LinuxLinux

6.0Affected
before 6.0Not affected
5.4.302 through 5.4.*Not affected
5.10.247 through 5.10.*Not affected
5.15.197 through 5.15.*Not affected
6.1.159 through 6.1.*Not affected
6.6.117 through 6.6.*Not affected
6.12.58 through 6.12.*Not affected
6.17.8 through 6.17.*Not affected
6.18 and laterNot affected

References

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