phy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93276
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 16:17:24 UTC
Updated2026-09-24 16:17:24 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: phy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator devm_regulator_get_exclusive() initialises the regulator with enable_count = 1, requiring the consumer to disable it before release. The devm disable action was previously only registered when the caller explicitly requested enable, so when the regulator was left in its initial enabled state without an explicit enable call, the cleanup path skipped decrementing enable_count, triggering a WARN_ON during regulator release on device removal. Fix this by always registering the devm disable action based on the actual enabled state via regulator_is_enabled(), regardless of whether the caller requested an explicit enable. This covers both the explicitly enabled case and the initial state set by devm_regulator_get_exclusive().

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 24843404efe47eab1ee88d7475a0be0f2f6fd9db bf7fefbc26e292c08cfe7b6496b879109ef1475a git Not specified
CNA Linux Linux affected 24843404efe47eab1ee88d7475a0be0f2f6fd9db 935f6e837a83b86b073a7601f699dc2c00e01322 git Not specified
CNA Linux Linux affected 24843404efe47eab1ee88d7475a0be0f2f6fd9db 49c9b71b45081e5e5eeb507a2d6edb80d332dc59 git Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/49c9b71b45081e5e5eeb507a2d6edb80d332dc59 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bf7fefbc26e292c08cfe7b6496b879109ef1475a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/935f6e837a83b86b073a7601f699dc2c00e01322 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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