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power: supply: charger-manager: register regulators before exposing sysfs

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: power: supply: charger-manager: register regulators before exposing sysfs charger_manager_remove() and the err_reg_extcon probe error path free each charger regulator with regulator_put() before tearing down the power_supply sysfs entries (power_supply_unregister()). charger_manager_remove() also calls try_charger_enable(cm, false) after the regulator_put() loop. A concurrent write to a charger's externally_control sysfs attribute that lands between regulator_put() and power_supply_unregister() can run charger_externally_control_store() and call try_charger_enable(), which, when charging is enabled, dereferences the already-freed consumer handle. When charging is enabled, try_charger_enable(cm, false) in .remove() also dereferences the freed handles directly. Both leave use-after-free windows. Symmetrically, probe registers the sysfs entries (power_supply_register) before acquiring the regulators (regulator_get, inside charger_manager_register_extcon), so userspace can reach externally_control before the regulators are available. Split charger_manager_register_extcon() on the sync/async boundary: charger_manager_get_regulators() (regulator_get only, no async producer) now runs before power_supply_register() so sysfs is not live before regulators are available, and charger_manager_register_extcon() keeps only the extcon notifier/work setup, still after power_supply_register() so a power_supply_register() failu

Announced Source revision 1
Original source ↗

CVE-2026-89472

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89472

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
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Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3950c7865cd7c963982a2c94457182b96732f4c9",
        "lessThan": "6e1645a6ee85d070c2d8dd847f1ce110dc2455c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3950c7865cd7c963982a2c94457182b96732f4c9",
        "lessThan": "af3ce383ba0d0d48957a22ac7058ff5698775898",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3950c7865cd7c963982a2c94457182b96732f4c9",
        "lessThan": "86e4fa65368f3bbb506dddba8c9eedc75bd603b2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3950c7865cd7c963982a2c94457182b96732f4c9",
        "lessThan": "6d532582ff3c420598f02945b13184c738cc1581",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3950c7865cd7c963982a2c94457182b96732f4c9",
        "lessThan": "c57cb36f76eb7ced45f57af1a890d8f3a6d76342",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/power/supply/charger-manager.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/power/supply/charger-manager.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89472

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#46663 · Revision 1
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Publisher date
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