Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7c97366f5dac5255e60a317ffe3a5b18f3745547 before f9f987472f4b8ab177be2b6492a59278ed969479; affected 36c41e9724c9a7a7cda37f5a4e9d94f25c8031c4 before 7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2; affected 93f116c3393a22acab96ad1bef12b2572eb80ca4 before 0326429e8ba99892e1d1e115dc8e88e1a3b64e24; affected e584cb58a2ea7ff4d3a4bc43d5ca512ed3ecb77d before a36e5e800b9c93e3e1ffa42f34d38b36775dbcee; affected 85acaba2f42b557499bab3608307f17bf13beb69 before 7de4d46be40738c7e48e64b5cc0a34aa1e047b0a; affected ec35c1969650e7cb6c8a91020e568ed46e3551b0 before e002e92e88e12457373ed096b18716d97e7bbb20 |
| Linux / Linux | affected 6.12.78 before 6.12.81; affected 6.18.19 before 6.18.22; affected 6.19.9 before 6.19.12 |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f9f987472f4b8ab177be2b6492a59278ed969479
- https://git.kernel.org/stable/c/7fce959e9be3bf63bb0fdf4b05f9cc42cb289fe2
- https://git.kernel.org/stable/c/0326429e8ba99892e1d1e115dc8e88e1a3b64e24
- https://git.kernel.org/stable/c/a36e5e800b9c93e3e1ffa42f34d38b36775dbcee
- https://git.kernel.org/stable/c/7de4d46be40738c7e48e64b5cc0a34aa1e047b0a
- https://git.kernel.org/stable/c/e002e92e88e12457373ed096b18716d97e7bbb20