Medium 5.5Published Jun 3, 2026

CVE-2026-46252regulator: core: fix locking in regulator_resolve_supply() error path

Updated under an hour ago (Oct 26, 2026, 1:40 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Jul 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before e77357dc2293283fc08a485b1e2e571d91d02622; from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before a8a2eab1166bc33ee38ca371cff425bdb5681e47; from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before 60747114fd2a38739130b715e7b2d40ce848f0be; from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before c84860dac7af7dc3c3e3c9ae86d65e222c2f3b0c; 36a1f1b6ddc6d1442424e29548e790633ca39c7b builds before 3b7fffd7a8984a1c009f668765ee7631fd6b87c8; from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before bde74af8d4466213007bdd42cc85fa72c861dea7; from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before c66e0db0f37290b53c57994f998bb55590364fd0; from 36a1f1b6ddc6d1442424e29548e790633ca39c7b before 497330b203d2c59c5ff3fa4c34d14494d7203bc3	CNA record
linux linux_kernel linux:linux_kernel	from 4.2.1 before 6.19.4; 4.2; 4.2; 4.2; 4.2; 4.2; 4.2	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.