CVE-2022-50250None▾ SunlitIn 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. ┌───────────────────┐ …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= dc1b1d7faf616ed663d0bba9be5abb4d1ed35d01 < dc3391d49479bc2bf8a2b88dbf86fdd800882feeLinux >= f44b07472f29ae313ce875dc7b9c75b100c608b8 < 5bfc53df288e8ea54ca6866fb92034214940183fLinux >= 089b3f61ecfc43ca4ea26d595e1d31ead6de3f7b < 4b737246ff50f810d6ab4be13c1388a07f0c14b1Linux >= 089b3f61ecfc43ca4ea26d595e1d31ead6de3f7b < feb847e6591e8c7a09cc39721cc9ca74fd9a5d80Linux >= 089b3f61ecfc43ca4ea26d595e1d31ead6de3f7b < 4dd6e1cc9c7403f1ee1b7eee85bc31b797ae8347Linux >= 089b3f61ecfc43ca4ea26d595e1d31ead6de3f7b < bc6c381df5793ebcf32db88a3e65acf7870379fcLinux >= 089b3f61ecfc43ca4ea26d595e1d31ead6de3f7b < 0591b14ce0398125439c759f889647369aa616a0Linux >= 4.19.226 < 4.19.270Linux >= 5.4.7 < 5.4.229Linux 5.5Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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