CVE-2026-46285

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After the loop,\ndocg3->cascade->bch dereferences the already-freed pointer.\n\nFix this by accessing cascade->bch directly, which is equivalent\nsince docg3->cascade points back to the same cascade struct, and\nis already available as a local variable. This also removes the\nnow-unused docg3 local variable."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/devices/docg3.c"], "versions": [{"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "8408655ec8344511667b61d8257dc59c80ee3391", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "f5d2ed4ed47d3906e2495a3537a48b127f497a17", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "2bf706fe7831b319f23a85b9728f961cfed40c3e", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "d26f8c361f751c188b7ebaf8189aa0258968fd98", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "16f6588a3b7a2a20d10ad9b766be74c60ba347cc", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "d89044889ecd11b0c2f86663597246e9bdd25679", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "d49628d63d4e6bbc8a1621afb88e5fc901611bee", "status": "affected", "versionType": "git"}, {"version": "c8ae3f744ddca0da164bcacee42d1d4b6fe7027d", "lessThan": "ca19808bc6fac7e29420d8508df569b346b3e339", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mtd/devices/docg3.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.1"}]}]}], "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"}, {"url": "https://git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98"}, {"url": "https://git.kernel.org/stable/c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc"}, {"url": "https://git.kernel.org/stable/c/d89044889ecd11b0c2f86663597246e9bdd25679"}, {"url": "https://git.kernel.org/stable/c/d49628d63d4e6bbc8a1621afb88e5fc901611bee"}, {"url": "https://git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339"}], "title": "mtd: docg3: fix use-after-free in docg3_release()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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After the loop,\ndocg3->cascade->bch dereferences the already-freed pointer.\n\nFix this by accessing cascade->bch directly, which is equivalent\nsince docg3->cascade points back to the same cascade struct, and\nis already available as a local variable. 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->floors[0]->priv 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->cascade->bch desreferencia el puntero ya liberado.\n\nSolucione esto al acceder a cascade->bch directamente, lo cual es equivalente ya que docg3->cascade apunta de nuevo a la misma estructura cascade, y ya est\u00e1 disponible como una variable local. Esto tambi\u00e9n elimina la variable local docg3 ahora no utilizada."}], "id": "CVE-2026-46285", "lastModified": "2026-07-23T08:10:00.137", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-08T17:16:46.347", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/16f6588a3b7a2a20d10ad9b766be74c60ba347cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2bf706fe7831b319f23a85b9728f961cfed40c3e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8408655ec8344511667b61d8257dc59c80ee3391"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca19808bc6fac7e29420d8508df569b346b3e339"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d26f8c361f751c188b7ebaf8189aa0258968fd98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d49628d63d4e6bbc8a1621afb88e5fc901611bee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d89044889ecd11b0c2f86663597246e9bdd25679"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f5d2ed4ed47d3906e2495a3537a48b127f497a17"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mtd: docg3: fix use-after-free in docg3_release()", "id": "2486447", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486447"}, "csaw": false, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's `mtd: docg3` module. The `docg3_release()` function attempts to access memory that has already been deallocated, leading to a use-after-free vulnerability. This issue could allow a local attacker to cause a denial of service or potentially execute arbitrary code."], "name": "CVE-2026-46285", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46285\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46285\nhttps://lore.kernel.org/linux-cve-announce/2026060843-CVE-2026-46285-0239@gregkh/T"]}

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