In the Linux kernel, the following vulnerability has been resolved:
driver core: fix potential null-ptr-deref in device_add()
I got the following null-ptr-deref report while doing fault injection test:
BUG: kernel NULL pointer dereference, address: 0000000000000058
CPU: 2 PID: 278 Comm: 37-i2c-ds2482 Tainted: G B W N 6.1.0-rc3+
RIP: 0010:klist_put+0x2d/0xd0
Call Trace:
<TASK>
klist_remove+0xf1/0x1c0
device_release_driver_internal+0x196/0x210
bus_remove_device+0x1bd/0x240
device_add+0xd3d/0x1100
w1_add_master_device+0x476/0x490 [wire]
ds2482_probe+0x303/0x3e0 [ds2482]
This is how it happened:
w1_alloc_dev()
// The dev->driver is set to w1_master_driver.
memcpy(&dev->dev, device, sizeof(struct device));
device_add()
bus_add_device()
dpm_sysfs_add() // It fails, calls bus_remove_device.
// error path
bus_remove_device()
// The dev->driver is not null, but driver is not bound.
__device_release_driver()
klist_remove(&dev->p->knode_driver) <-- It causes null-ptr-deref.
// normal path
bus_probe_device() // It's not called yet.
device_bind_driver()
If dev->driver is set, in the error path after calling bus_add_device()
in device_add(), bus_remove_device() is called, then the device will be
detached from driver. But device_bind_driver() is not called yet, so it
causes null-ptr-deref while access the 'knode_driver'. To fix this, set
dev->driver to null in the error path before calling bus_remove_device().
References
Configurations
Configuration 1 (hide)
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History
26 Feb 2026, 18:48
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-476 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/17982304806c5c10924e73f7ca5556e0d7378452 - Patch | |
| References | () https://git.kernel.org/stable/c/2c59650d078b1b3f1ea50d5f8ee9fcc537dc02d3 - Patch | |
| References | () https://git.kernel.org/stable/c/7cf515bf9e8c2908dc170ecf2df117162a16c9c5 - Patch | |
| References | () https://git.kernel.org/stable/c/97aa8fb74bbe9aaf4ed5962a784f73b071bd16bf - Patch | |
| References | () https://git.kernel.org/stable/c/f6837f34a34973ef6600c08195ed300e24e97317 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
06 Feb 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
30 Dec 2025, 13:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-12-30 13:16
Updated : 2026-02-26 18:48
NVD link : CVE-2023-54321
Mitre link : CVE-2023-54321
CVE.ORG link : CVE-2023-54321
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference