In the Linux kernel, the following vulnerability has been resolved:
regulator: core: fix use_count leakage when handling boot-on
I found a use_count leakage towards supply regulator of rdev with
boot-on option.
┌───────────────────┐ ┌───────────────────┐
│ regulator_dev A │ │ regulator_dev B │
│ (boot-on) │ │ (boot-on) │
│ use_count=0 │◀──supply──│ use_count=1 │
│ │ │ │
└───────────────────┘ └───────────────────┘
In case of rdev(A) configured with `regulator-boot-on', the use_count
of supplying regulator(B) will increment inside
regulator_enable(rdev->supply).
Thus, B will acts like always-on, and further balanced
regulator_enable/disable cannot actually disable it anymore.
However, B was also configured with `regulator-boot-on', we wish it
could be disabled afterwards.
References
Configurations
Configuration 1 (hide)
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History
No history.
Information
Published : 2025-09-15 14:15
Updated : 2025-11-25 14:40
NVD link : CVE-2022-50250
Mitre link : CVE-2022-50250
CVE.ORG link : CVE-2022-50250
JSON object : View
Products Affected
linux
- linux_kernel
CWE