5.5

CVE-2026-46252

regulator: core: fix locking in regulator_resolve_supply() error path

In the Linux kernel, the following vulnerability has been resolved:

regulator: core: fix locking in regulator_resolve_supply() error path

If late enabling of a supply regulator fails in
regulator_resolve_supply(), the code currently triggers a lockdep
warning:

    WARNING: drivers/regulator/core.c:2649 at _regulator_put+0x80/0xa0, CPU#6: kworker/u32:4/596
    ...
    Call trace:
     _regulator_put+0x80/0xa0 (P)
     regulator_resolve_supply+0x7cc/0xbe0
     regulator_register_resolve_supply+0x28/0xb8

as the regulator_list_mutex must be held when calling _regulator_put().

To solve this, simply switch to using regulator_put().

While at it, we should also make sure that no concurrent access happens
to our rdev while we clear out the supply pointer. Add appropriate
locking to ensure that.

While the code in question will be removed altogether in a follow-up
commit, I believe it is still beneficial to have this corrected before
removal for future reference.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.2.1 < 6.19.4
Linux ≫ Linux Kernel Version4.2 Update-
Linux ≫ Linux Kernel Version4.2 Updaterc4
Linux ≫ Linux Kernel Version4.2 Updaterc5
Linux ≫ Linux Kernel Version4.2 Updaterc6
Linux ≫ Linux Kernel Version4.2 Updaterc7
Linux ≫ Linux Kernel Version4.2 Updaterc8
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.09% 0.006
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-667 Improper Locking

The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

https://git.kernel.org/stable/c/c66e0db0f37290b53c57994f998bb55590364fd0
Patch
https://git.kernel.org/stable/c/497330b203d2c59c5ff3fa4c34d14494d7203bc3
Patch
https://git.kernel.org/stable/c/bde74af8d4466213007bdd42cc85fa72c861dea7
https://git.kernel.org/stable/c/3b7fffd7a8984a1c009f668765ee7631fd6b87c8
https://git.kernel.org/stable/c/60747114fd2a38739130b715e7b2d40ce848f0be
https://git.kernel.org/stable/c/a8a2eab1166bc33ee38ca371cff425bdb5681e47
https://git.kernel.org/stable/c/c84860dac7af7dc3c3e3c9ae86d65e222c2f3b0c
https://git.kernel.org/stable/c/e77357dc2293283fc08a485b1e2e571d91d02622