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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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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This also removes the\\nnow-unused docg3 local variable.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nmtd: docg3: corregir uso despu\u00e9s de liberaci\u00f3n en docg3_release()\\n\\nEn docg3_release(), el puntero docg3 se obtiene de cascade-\u003efloors[0]-\u003epriv antes del bucle que llama a doc_release_device() en cada floor. doc_release_device() libera la estructura docg3 a trav\u00e9s de kfree(docg3) en la l\u00ednea 1881. Despu\u00e9s del bucle, docg3-\u003ecascade-\u003ebch desreferencia el puntero ya liberado.\\n\\nSolucione esto al acceder a cascade-\u003ebch directamente, lo cual es equivalente ya que docg3-\u003ecascade apunta de nuevo a la misma estructura cascade, y ya est\u00e1 disponible como una variable local. 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    "redhat_vex": {
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      "current_release_date": "2026-06-28T06:35:11+00:00",
      "cve": "CVE-2026-46285",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mtd: docg3: fix use-after-free in docg3_release()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46285.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T16:53:08Z",
      "cve": "CVE-2026-46285",
      "id": "CVE-2026-46285",
      "initial_release_date": "2026-06-09T02:21:05Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "528",
      "product_status:known_not_affected": "190",
      "product_status:recommended": "254",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46285",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46285.json",
      "version": "10"
    }
  }
}



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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.