usbnet: Prevents free active kevent
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 3 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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().
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.4.211 to before 5.4.302; 5.10.137 to before 5.10.247; 5.15.61 to before 5.15.197; 4.9.326 to before 4.10; 4.14.291 to before 4.15; 4.19.256 to before 4.20; 5.18.18 to before 5.19; 5.19.2 to before 5.20 | 5.4.302, 5.10.247, 5.15.197, 4.10, 4.15, 4.20, 5.19, 5.20 | Patch available | CNA |
| Linux | Linux | 6.0 and later | 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.211 to before 5.4.302; 5.10.137 to before 5.10.247; 5.15.61 to before 5.15.197; 4.9.326 to before 4.10; 4.14.291 to before 4.15; 4.19.256 to before 4.20; 5.18.18 to before 5.19; 5.19.2 to before 5.20 Fixed in 5.4.302, 5.10.247, 5.15.197, 4.10, 4.15, 4.20, 5.19, 5.20 Patch available CNA
- Linux VendorLinux Affected 6.0 and later Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 4.10, 4.15, 4.20, 5.19, 5.20
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2025-68312
- 2026-10-03 Alias added: GHSA-g57h-pwpg-2849
References
Other 8
- https://git.kernel.org/stable/c/285d4b953f2ca03c358f986718dd89ee9bde632e
- https://git.kernel.org/stable/c/88a38b135d69f5db9024ff6527232f1b51be8915
- https://git.kernel.org/stable/c/43005002b60ef3424719ecda16d124714b45da3b
- https://git.kernel.org/stable/c/3a10619fdefd3051aeb14860e4d4335529b4e94d
- https://git.kernel.org/stable/c/9a579d6a39513069d298eee70770bbac8a148565
- https://git.kernel.org/stable/c/2ce1de32e05445d77fc056f6ff8339cfb78a5f84
- https://git.kernel.org/stable/c/5158fb8da162e3982940f30cd01ed77bdf42c6fc
- https://git.kernel.org/stable/c/420c84c330d1688b8c764479e5738bbdbf0a33de
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- TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2025-68312 · CVE Program
- CVE-2025-68312 · NVD
- FIRST EPSS
- GHSA-g57h-pwpg-2849 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-68312 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences