CVE-2021-46966

{"id": "CVE-2021-46966", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-02-27T19:04:07.127", "references": [{"url": "https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: custom_method: fix potential use-after-free issue\n\nIn cm_write(), buf is always freed when reaching the end of the\nfunction. If the requested count is less than table.length, the\nallocated buffer will be freed but subsequent calls to cm_write() will\nstill try to access it.\n\nRemove the unconditional kfree(buf) at the end of the function and\nset the buf to NULL in the -EINVAL error path to match the rest of\nfunction."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ACPI: custom_method: soluciona un posible problema de use-after-free En cm_write(), buf siempre se libera al llegar al final de la funci\u00f3n. Si el recuento solicitado es menor que table.length, el b\u00fafer asignado se liberar\u00e1, pero las llamadas posteriores a cm_write() seguir\u00e1n intentando acceder a \u00e9l. Elimine el kfree(buf) incondicional al final de la funci\u00f3n y establezca el buf en NULL en la ruta de error -EINVAL para que coincida con el resto de la funci\u00f3n."}], "lastModified": "2024-12-06T17:55:15.673", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "54A3D99C-739B-406F-AF5B-ABFF201FD7EA", "versionEndExcluding": "4.4.269", "versionStartIncluding": "4.4.195"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "40842990-645D-419D-851F-07328ECC681E", "versionEndExcluding": "4.9.269", "versionStartIncluding": "4.9.195"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "06219DEF-0B7F-4D93-9878-9DC640945517", "versionEndExcluding": "4.14.233", "versionStartIncluding": "4.14.147"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3E80ED24-F781-449F-8035-CBA0FB5C6691", "versionEndExcluding": "4.19.191", "versionStartIncluding": "4.19.77"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "45C90F78-15A8-452F-AA7D-00A762FDEFE7", "versionEndExcluding": "5.4.118", "versionStartIncluding": "5.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "003E22D0-CA29-4338-8B35-0754C740074F", "versionEndExcluding": "5.10.36", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EEC03413-9760-46D4-AC1D-EB084A1D4111", "versionEndExcluding": "5.11.20", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F9D6B2DE-7E4A-4B3B-9AEE-3A2C5F23DA32", "versionEndExcluding": "5.12.3", "versionStartIncluding": "5.12"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}