CVE-2026-46285 (GCVE-0-2026-46285)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:41 – Updated: 2026-06-14 18:06
VLAI?
Title
mtd: docg3: fix use-after-free in docg3_release()
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: docg3: fix use-after-free in docg3_release() In docg3_release(), the docg3 pointer is obtained from cascade->floors[0]->priv before the loop that calls doc_release_device() on each floor. doc_release_device() frees the docg3 struct via kfree(docg3) at line 1881. After the loop, docg3->cascade->bch dereferences the already-freed pointer. Fix this by accessing cascade->bch directly, which is equivalent since docg3->cascade points back to the same cascade struct, and is already available as a local variable. This also removes the now-unused docg3 local variable.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < 8408655ec8344511667b61d8257dc59c80ee3391 (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < f5d2ed4ed47d3906e2495a3537a48b127f497a17 (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < 2bf706fe7831b319f23a85b9728f961cfed40c3e (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < d26f8c361f751c188b7ebaf8189aa0258968fd98 (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < 16f6588a3b7a2a20d10ad9b766be74c60ba347cc (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < d89044889ecd11b0c2f86663597246e9bdd25679 (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < d49628d63d4e6bbc8a1621afb88e5fc901611bee (git)
Affected: c8ae3f744ddca0da164bcacee42d1d4b6fe7027d , < ca19808bc6fac7e29420d8508df569b346b3e339 (git)
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    Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/docg3.c"
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            },
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              "status": "unaffected",
              "version": "0",
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            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
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            {
              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.140",
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
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              "version": "7.0.4",
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              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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                  "vulnerable": true
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: docg3: fix use-after-free in docg3_release()\n\nIn docg3_release(), the docg3 pointer is obtained from\ncascade-\u003efloors[0]-\u003epriv before the loop that calls\ndoc_release_device() on each floor. doc_release_device() frees the\ndocg3 struct via kfree(docg3) at line 1881. After the loop,\ndocg3-\u003ecascade-\u003ebch dereferences the already-freed pointer.\n\nFix this by accessing cascade-\u003ebch directly, which is equivalent\nsince docg3-\u003ecascade points back to the same cascade struct, and\nis already available as a local variable. This also removes the\nnow-unused docg3 local variable."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:06:23.744Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8408655ec8344511667b61d8257dc59c80ee3391"
        },
        {
          "url": "https://git.kernel.org/stable/c/f5d2ed4ed47d3906e2495a3537a48b127f497a17"
        },
        {
          "url": "https://git.kernel.org/stable/c/2bf706fe7831b319f23a85b9728f961cfed40c3e"
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          "url": "https://git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339"
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      ],
      "title": "mtd: docg3: fix use-after-free in docg3_release()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46285",
    "datePublished": "2026-06-08T15:41:28.566Z",
    "dateReserved": "2026-05-13T15:03:33.110Z",
    "dateUpdated": "2026-06-14T18:06:23.744Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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