CVE-2026-93276 (GCVE-0-2026-93276)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:52 – Updated: 2026-10-19 09:08
VLAI
Title
phy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator
Summary
In 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().
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 24843404efe47eab1ee88d7475a0be0f2f6fd9db , < bf7fefbc26e292c08cfe7b6496b879109ef1475a (git)
Affected: 24843404efe47eab1ee88d7475a0be0f2f6fd9db , < 935f6e837a83b86b073a7601f699dc2c00e01322 (git)
Affected: 24843404efe47eab1ee88d7475a0be0f2f6fd9db , < 49c9b71b45081e5e5eeb507a2d6edb80d332dc59 (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nphy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator\n\ndevm_regulator_get_exclusive() initialises the regulator with\nenable_count = 1, requiring the consumer to disable it before release.\n\nThe devm disable action was previously only registered when the caller\nexplicitly requested enable, so when the regulator was left in its initial\nenabled state without an explicit enable call, the cleanup path skipped\ndecrementing enable_count, triggering a WARN_ON during regulator\nrelease on device removal.\n\nFix this by always registering the devm disable action based on the actual\nenabled state via regulator_is_enabled(), regardless of whether the\ncaller requested an explicit enable. This covers both the explicitly\nenabled case and the initial state set by devm_regulator_get_exclusive()."
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      "title": "phy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nphy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator\n\ndevm_regulator_get_exclusive() initialises the regulator with\nenable_count = 1, requiring the consumer to disable it before release.\n\nThe devm disable action was previously only registered when the caller\nexplicitly requested enable, so when the regulator was left in its initial\nenabled state without an explicit enable call, the cleanup path skipped\ndecrementing enable_count, triggering a WARN_ON during regulator\nrelease on device removal.\n\nFix this by always registering the devm disable action based on the actual\nenabled state via regulator_is_enabled(), regardless of whether the\ncaller requested an explicit enable. This covers both the explicitly\nenabled case and the initial state set by devm_regulator_get_exclusive()."
          }
        ],
        "id": "CVE-2026-93276",
        "lastModified": "2026-10-19T10:17:19.130",
        "metrics": {},
        "published": "2026-09-24T16:17:24.797",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: phy: renesas: phy-rcar-gen3-usb2: Fix devm action registration for disabled VBUS regulator",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93276.json",
      "version": "3"
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}



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