Vulnerability-Lookup

GHSA-42X9-78R4-7GJ5

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-07-08 21:30

Details

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

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46285"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T17:16:46Z",
    "severity": "HIGH"
  },
  "details": "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": "GHSA-42x9-78r4-7gj5",
  "modified": "2026-07-08T21:30:21Z",
  "published": "2026-06-08T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46285"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bf706fe7831b319f23a85b9728f961cfed40c3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8408655ec8344511667b61d8257dc59c80ee3391"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d49628d63d4e6bbc8a1621afb88e5fc901611bee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d89044889ecd11b0c2f86663597246e9bdd25679"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5d2ed4ed47d3906e2495a3537a48b127f497a17"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-06-08 15:41 – Updated: 2026-06-14 18:06

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

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/8408655ec83445116…
https://git.kernel.org/stable/c/f5d2ed4ed47d3906e…
https://git.kernel.org/stable/c/2bf706fe7831b319f…
https://git.kernel.org/stable/c/d26f8c361f751c188…
https://git.kernel.org/stable/c/16f6588a3b7a2a20d…
https://git.kernel.org/stable/c/d89044889ecd11b0c…
https://git.kernel.org/stable/c/d49628d63d4e6bbc8…
https://git.kernel.org/stable/c/ca19808bc6fac7e29…

Impacted products

2 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)
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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JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/mtd/devices/docg3.c"
          ],
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          "vendor": "Linux",
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              "status": "affected",
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            },
            {
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              "versionType": "git"
            },
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
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              "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"
            },
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              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "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."
        }
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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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    "datePublished": "2026-06-08T15:41:28.566Z",
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}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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