CVE-2021-47342

{"id": "CVE-2021-47342", "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": "2024-05-21T15:15:20.923", "references": [{"url": "https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/61bb4a1c417e5b95d9edb4f887f131de32e419cb", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/7ed572cdf11081f8f9e07abd4bea56a3f2c4edbd", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b663890d854403e566169f7e90aed5cd6ff64f6b", "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\next4: fix possible UAF when remounting r/o a mmp-protected file system\n\nAfter commit 618f003199c6 (\"ext4: fix memory leak in\next4_fill_super\"), after the file system is remounted read-only, there\nis a race where the kmmpd thread can exit, causing sbi->s_mmp_tsk to\npoint at freed memory, which the call to ext4_stop_mmpd() can trip\nover.\n\nFix this by only allowing kmmpd() to exit when it is stopped via\next4_stop_mmpd().\n\nBug-Report-Link: <20210629143603.2166962-1-yebin10@huawei.com>"}, {"lang": "es", "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: corrige posible UAF al remontar el sistema de archivos protegido por r/oa mmp. Despu\u00e9s del commit 618f003199c6 (\"ext4: corrige la p\u00e9rdida de memoria en ext4_fill_super\"), despu\u00e9s de que se vuelve a montar el sistema de archivos solo que hay una ejecuci\u00f3n donde el hilo kmmpd puede salir, causando que sbi-&gt;s_mmp_tsk apunte a la memoria liberada, con la que la llamada a ext4_stop_mmpd() puede tropezar. Solucione este problema permitiendo que kmmpd() salga solo cuando se detiene a trav\u00e9s de ext4_stop_mmpd(). Enlace de informe de error: &lt;20210629143603.2166962-1-yebin10@huawei.com&gt;"}], "lastModified": "2024-12-26T19:29:20.557", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DF93F2A0-1BCC-4EC3-AF79-F186B97DF86D", "versionEndExcluding": "5.10.77"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AEF57B20-E396-45AE-9BB3-AE6B11D9AC43", "versionEndExcluding": "5.13.3", "versionStartIncluding": "5.11"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}