In the Linux kernel, the following vulnerability has been resolved:
power: supply: bq25890: Fix external_power_changed race
bq25890_charger_external_power_changed() dereferences bq->charger,
which gets sets in bq25890_power_supply_init() like this:
bq->charger = devm_power_supply_register(bq->dev, &bq->desc, &psy_cfg);
As soon as devm_power_supply_register() has called device_add()
the external_power_changed callback can get called. So there is a window
where bq25890_charger_external_power_changed() may get called while
bq->charger has not been set yet leading to a NULL pointer dereference.
This race hits during boot sometimes on a Lenovo Yoga Book 1 yb1-x90f
when the cht_wcove_pwrsrc (extcon) power_supply is done with detecting
the connected charger-type which happens to exactly hit the small window:
BUG: kernel NULL pointer dereference, address: 0000000000000018
<snip>
RIP: 0010:__power_supply_is_supplied_by+0xb/0xb0
<snip>
Call Trace:
<TASK>
__power_supply_get_supplier_property+0x19/0x50
class_for_each_device+0xb1/0xe0
power_supply_get_property_from_supplier+0x2e/0x50
bq25890_charger_external_power_changed+0x38/0x1b0 [bq25890_charger]
__power_supply_changed_work+0x30/0x40
class_for_each_device+0xb1/0xe0
power_supply_changed_work+0x5f/0xe0
<snip>
Fixing this is easy. The external_power_changed callback gets passed
the power_supply which will eventually get stored in bq->charger,
so bq25890_charger_external_power_changed() can simply directly use
the passed in psy argument which is always valid.
References
Configurations
Configuration 1 (hide)
|
History
24 Nov 2025, 21:02
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
| CWE | CWE-362 | |
| References | () https://git.kernel.org/stable/c/029a443b9b6424170f00f6dd5b7682e682cce92e - Patch | |
| References | () https://git.kernel.org/stable/c/72c28207c19c2c46fab8ae994aff25e197fb2949 - Patch | |
| References | () https://git.kernel.org/stable/c/9d20fa1982c35697f3f8c4ae0f12791691ae5958 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
Information
Published : 2025-09-15 14:15
Updated : 2025-11-24 21:02
NVD link : CVE-2023-53166
Mitre link : CVE-2023-53166
CVE.ORG link : CVE-2023-53166
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')