FKIE_CVE-2026-46252

Vulnerability from fkie_nvd - Published: 2026-06-03 18:16 - Updated: 2026-07-22 20:10
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b7fffd7a8984a1c009f668765ee7631fd6b87c8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/497330b203d2c59c5ff3fa4c34d14494d7203bc3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60747114fd2a38739130b715e7b2d40ce848f0be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8a2eab1166bc33ee38ca371cff425bdb5681e47
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bde74af8d4466213007bdd42cc85fa72c861dea7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c66e0db0f37290b53c57994f998bb55590364fd0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c84860dac7af7dc3c3e3c9ae86d65e222c2f3b0c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e77357dc2293283fc08a485b1e2e571d91d02622
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 4.2
linux linux_kernel 4.2
linux linux_kernel 4.2
linux linux_kernel 4.2
linux linux_kernel 4.2
linux linux_kernel 4.2
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/regulator/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "status": "affected",
              "version": "36a1f1b6ddc6d1442424e29548e790633ca39c7b",
              "versionType": "git"
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            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/regulator/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.177",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EACE7ACD-1611-41BF-B757-A23CEC8346ED",
              "versionEndExcluding": "6.19.4",
              "versionStartIncluding": "4.2.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.2:-:*:*:*:*:*:*",
              "matchCriteriaId": "37D5F2FA-B7D0-4F9D-BC97-F450E5839C7B",
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              "matchCriteriaId": "8C5DADE2-2A31-4F65-8A7E-224C02958A81",
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              "matchCriteriaId": "130E1C2A-45DE-4C16-8FFA-06E9C9F7F175",
              "vulnerable": true
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              "matchCriteriaId": "78F0CC21-E28A-4B83-B65B-94AB9242F345",
              "vulnerable": true
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              "matchCriteriaId": "AED16DC6-6364-4B57-92A1-F14F347DADF7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:4.2:rc8:*:*:*:*:*:*",
              "matchCriteriaId": "03A4BCF1-5A7D-4E74-948F-134F0E57D73B",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: core: fix locking in regulator_resolve_supply() error path\n\nIf late enabling of a supply regulator fails in\nregulator_resolve_supply(), the code currently triggers a lockdep\nwarning:\n\n    WARNING: drivers/regulator/core.c:2649 at _regulator_put+0x80/0xa0, CPU#6: kworker/u32:4/596\n    ...\n    Call trace:\n     _regulator_put+0x80/0xa0 (P)\n     regulator_resolve_supply+0x7cc/0xbe0\n     regulator_register_resolve_supply+0x28/0xb8\n\nas the regulator_list_mutex must be held when calling _regulator_put().\n\nTo solve this, simply switch to using regulator_put().\n\nWhile at it, we should also make sure that no concurrent access happens\nto our rdev while we clear out the supply pointer. Add appropriate\nlocking to ensure that.\n\nWhile the code in question will be removed altogether in a follow-up\ncommit, I believe it is still beneficial to have this corrected before\nremoval for future reference."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nregulator: core: corregir el bloqueo en la ruta de error de regulator_resolve_supply()\n\nSi la habilitaci\u00f3n tard\u00eda de un regulador de suministro falla en regulator_resolve_supply(), el c\u00f3digo actualmente activa una advertencia de lockdep:\n\nADVERTENCIA: drivers/regulator/core.c:2649 at _regulator_put+0x80/0xa0, CPU#6: kworker/u32:4/596\n...\nTraza de llamada:\n _regulator_put+0x80/0xa0 (P)\n regulator_resolve_supply+0x7cc/0xbe0\n regulator_register_resolve_supply+0x28/0xb8\n\nya que el regulator_list_mutex debe mantenerse al llamar a _regulator_put().\n\nPara resolver esto, simplemente cambie a usar regulator_put().\n\nYa que estamos en ello, tambi\u00e9n deber\u00edamos asegurarnos de que no ocurra ning\u00fan acceso concurrente a nuestro rdev mientras borramos el puntero de suministro. A\u00f1ada un bloqueo apropiado para asegurar eso.\n\nAunque el c\u00f3digo en cuesti\u00f3n ser\u00e1 eliminado por completo en un commit de seguimiento, creo que sigue siendo beneficioso tener esto corregido antes de la eliminaci\u00f3n para futuras referencias."
    }
  ],
  "id": "CVE-2026-46252",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-06-03T18:16:25.797",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b7fffd7a8984a1c009f668765ee7631fd6b87c8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/497330b203d2c59c5ff3fa4c34d14494d7203bc3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60747114fd2a38739130b715e7b2d40ce848f0be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8a2eab1166bc33ee38ca371cff425bdb5681e47"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bde74af8d4466213007bdd42cc85fa72c861dea7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c66e0db0f37290b53c57994f998bb55590364fd0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c84860dac7af7dc3c3e3c9ae86d65e222c2f3b0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e77357dc2293283fc08a485b1e2e571d91d02622"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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