FKIE_CVE-2026-46285

Vulnerability from fkie_nvd - Published: 2026-06-08 17:16 - Updated: 2026-06-17 10:53
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2bf706fe7831b319f23a85b9728f961cfed40c3e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8408655ec8344511667b61d8257dc59c80ee3391
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d49628d63d4e6bbc8a1621afb88e5fc901611bee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d89044889ecd11b0c2f86663597246e9bdd25679
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5d2ed4ed47d3906e2495a3537a48b127f497a17
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/docg3.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8408655ec8344511667b61d8257dc59c80ee3391",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "f5d2ed4ed47d3906e2495a3537a48b127f497a17",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "2bf706fe7831b319f23a85b9728f961cfed40c3e",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "d26f8c361f751c188b7ebaf8189aa0258968fd98",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "16f6588a3b7a2a20d10ad9b766be74c60ba347cc",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "d89044889ecd11b0c2f86663597246e9bdd25679",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "d49628d63d4e6bbc8a1621afb88e5fc901611bee",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            },
            {
              "lessThan": "ca19808bc6fac7e29420d8508df569b346b3e339",
              "status": "affected",
              "version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/docg3.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-46285",
  "lastModified": "2026-06-17T10:53:28.737",
  "metrics": {},
  "published": "2026-06-08T17:16:46.347",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2bf706fe7831b319f23a85b9728f961cfed40c3e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8408655ec8344511667b61d8257dc59c80ee3391"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d49628d63d4e6bbc8a1621afb88e5fc901611bee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d89044889ecd11b0c2f86663597246e9bdd25679"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f5d2ed4ed47d3906e2495a3537a48b127f497a17"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.