UnratedFix available
regulator: core: fix use_count leakage when handling boot-on
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 4.19.270, 5.10.163, 5.15.86, 5.4.229, 6.0.16, 6.1.2
- CVEs
- CVE-2022-50250
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 06:52 UTC · Revision 1
Source evidence
regulator: core: fix use_count leakage when handling boot-on
core-osv · Original sourcePublished 15 Sept 2025, 14:02 UTC
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.
osv:CVE-2022-50250
Kernel
Fixed versions: 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2
Complete source record
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