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.

Published: 2026-06-03 Last update: 2026-06-09 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-46252 is rated Low Risk (22.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.08%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-46252

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.08% +0.06%
2 2026-06-04 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-46252

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]

Weakness enumeration for CVE-2026-46252

GitHub Security Advisory for CVE-2026-46252

GHSA-w447-hxj8-xq6p · Severity: medium — In the Linux kernel, the following vulnerability has been resolved: regulator: core: fix locking...

OS Trackers for CVE-2026-46252

vendor priority summary link
debian not yet assigned CVE-2026-46252 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 3, resolved 2. https://security-tracker.debian.org/tracker/CVE-2026-46252
redhat medium — https://access.redhat.com/security/cve/CVE-2026-46252
suse medium CVE-2026-46252 severity moderate: SUSE including 17 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 58 product×package rows across 15 product lines (SUSE Linux Enterprise High Availability Extension 15 SP7, SUSE Linux Enterprise Live Patching 15 SP7, … (15 product lines)): Known Not Affected 58. https://www.suse.com/security/cve/CVE-2026-46252/
ubuntu medium CVE-2026-46252 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1422 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 1024, ignored 172, needed 128, released 84, not-affected 11, needs-triage 3. https://ubuntu.com/security/CVE-2026-46252

Affected software / configurations for CVE-2026-46252

Vendor Product Version Raw CPE
linux linux_kernel >= 4.2.1, < 6.19.4 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 4.2 cpe:2.3:o:linux:linux_kernel:4.2:-:*:*:*:*:*:*
linux linux_kernel 4.2 cpe:2.3:o:linux:linux_kernel:4.2:rc4:*:*:*:*:*:*
linux linux_kernel 4.2 cpe:2.3:o:linux:linux_kernel:4.2:rc5:*:*:*:*:*:*
linux linux_kernel 4.2 cpe:2.3:o:linux:linux_kernel:4.2:rc6:*:*:*:*:*:*
linux linux_kernel 4.2 cpe:2.3:o:linux:linux_kernel:4.2:rc7:*:*:*:*:*:*
linux linux_kernel 4.2 cpe:2.3:o:linux:linux_kernel:4.2:rc8:*:*:*:*:*:*

References for CVE-2026-46252

cvelogic Threat Intelligence