Medium 5.5Published May 1, 2026

CVE-2026-31727usb: gadget: u_ether: Fix NULL pointer deref in eth_get_drvinfo

Updated under an hour ago (Oct 28, 2026, 3:40 AM ET)

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Jun 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7c97366f5dac5255e60a317ffe3a5b18f3745547 before f9f987472f4b8ab177be2b6492a59278ed969479; 36c41e9724c9a7a7cda37f5a4e9d94f25c8031c4 builds before 7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2; from 93f116c3393a22acab96ad1bef12b2572eb80ca4 before 0326429e8ba99892e1d1e115dc8e88e1a3b64e24; from e584cb58a2ea7ff4d3a4bc43d5ca512ed3ecb77d before a36e5e800b9c93e3e1ffa42f34d38b36775dbcee; 85acaba2f42b557499bab3608307f17bf13beb69 builds before 7de4d46be40738c7e48e64b5cc0a34aa1e047b0a; from ec35c1969650e7cb6c8a91020e568ed46e3551b0 before e002e92e88e12457373ed096b18716d97e7bbb20	CNA record
linux linux_kernel linux:linux_kernel	from 6.12.78 before 6.12.81; from 6.18.19 before 6.18.22; from 6.19.9 before 6.19.12; 7.0; 7.0; 7.0; 7.0; 7.0; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/f9f987472f4b8ab177be2b6492a59278ed969479
https://git.kernel.org/stable/c/7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2
https://git.kernel.org/stable/c/0326429e8ba99892e1d1e115dc8e88e1a3b64e24	patch
https://git.kernel.org/stable/c/a36e5e800b9c93e3e1ffa42f34d38b36775dbcee	patch
https://git.kernel.org/stable/c/7de4d46be40738c7e48e64b5cc0a34aa1e047b0a	patch
https://git.kernel.org/stable/c/e002e92e88e12457373ed096b18716d97e7bbb20	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.