Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_ether: Fix NULL pointer deref in eth_get_drvinfo Commit ec35c1969650 ("usb: gadget: f_ncm: Fix net_device lifecycle with device_move") reparents the gadget device to /sys/devices/virtual during unbind, clearing the gadget pointer. If the userspace tool queries on the surviving interface during this detached window, this leads to a NULL pointer dereference. Unable to handle kernel NULL pointer dereference Call trace: eth_get_drvinfo+0x50/0x90 ethtool_get_drvinfo+0x5c/0x1f0 __dev_ethtool+0xaec/0x1fe0 dev_ethtool+0x134/0x2e0 dev_ioctl+0x338/0x560 Add a NULL check for dev->gadget in eth_get_drvinfo(). When detached, skip copying the fw_version and bus_info strings, which is natively handled by ethtool_get_drvinfo for empty strings.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.12.78, < 6.12.81 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0326429e8ba99892e1d1e115dc8e88e1a3b64e24Patch
- https://git.kernel.org/stable/c/7de4d46be40738c7e48e64b5cc0a34aa1e047b0aPatch
- https://git.kernel.org/stable/c/a36e5e800b9c93e3e1ffa42f34d38b36775dbceePatch
- https://git.kernel.org/stable/c/e002e92e88e12457373ed096b18716d97e7bbb20Patch
FAQ
What is CVE-2026-31727?
CVE-2026-31727 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_ether: Fix NULL pointer deref in eth_get_drvinfo Commit ec35c1969650 ("usb: gadget: f_ncm: Fix net_device lifecycle...
How severe is CVE-2026-31727?
CVE-2026-31727 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31727?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.