In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_ether: Fix...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (8)
- https://nvd.nist.gov/vuln/detail/CVE-2026-31727
- https://git.kernel.org/stable/c/0326429e8ba99892e1d1e115dc8e88e1a3b64e24
- https://git.kernel.org/stable/c/7de4d46be40738c7e48e64b5cc0a34aa1e047b0a
- https://git.kernel.org/stable/c/a36e5e800b9c93e3e1ffa42f34d38b36775dbcee
- https://git.kernel.org/stable/c/e002e92e88e12457373ed096b18716d97e7bbb20
- https://git.kernel.org/stable/c/7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2
- https://git.kernel.org/stable/c/f9f987472f4b8ab177be2b6492a59278ed969479
- https://github.com/advisories/GHSA-8j24-6c4v-7q4p