CVE-2026-31727: Linux kernel · usb: gadget: u_ether: Fix NULL pointer deref in eth_get_drvinfo
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 11 Nov 2026, 23:24 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 1 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.
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
- git.kernel.org/stable/c/f9f987472f4b8ab177be2b6492a59278ed969479 (opens in a new tab)
- git.kernel.org/stable/c/7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2 (opens in a new tab)
- git.kernel.org/stable/c/0326429e8ba99892e1d1e115dc8e88e1a3b64e24 (opens in a new tab)
- git.kernel.org/stable/c/a36e5e800b9c93e3e1ffa42f34d38b36775dbcee (opens in a new tab)
- git.kernel.org/stable/c/7de4d46be40738c7e48e64b5cc0a34aa1e047b0a (opens in a new tab)
- git.kernel.org/stable/c/e002e92e88e12457373ed096b18716d97e7bbb20 (opens in a new tab)