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Therefore there is a race window\nbetween dasd_alias_get_start_dev() and _lcu_update() which sets\npavgroup to NULL with the lcu->lock held.\n\nFix by checking the pavgroup pointer with lcu->lock held."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: s390/dasd: corrige Ups en dasd_alias_get_start_dev debido a la falta de pavgroup. Corrige Ups en la funci\u00f3n dasd_alias_get_start_dev() causada porque el puntero pavgroup es NULL. El puntero pavgroup se verifica en la entrada de la funci\u00f3n pero sin que se mantenga presionado el bloqueo lcu->. Por lo tanto, existe una ventana de ejecuci\u00f3n entre dasd_alias_get_start_dev() y _lcu_update() que establece pavgroup en NULL con el bloqueo lcu->retenido. Para solucionarlo, compruebe el puntero de pavgroup con lcu->lock retenido."}], "id": "CVE-2022-48636", "lastModified": "2025-03-21T18:26:19.630", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-04-28T13:15:06.710", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036ac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup", "id": "2277833", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2277833"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ns390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup\nFix Oops in dasd_alias_get_start_dev() function caused by the pavgroup\npointer being NULL.\nThe pavgroup pointer is checked on the entrance of the function but\nwithout the lcu->lock being held. Therefore there is a race window\nbetween dasd_alias_get_start_dev() and _lcu_update() which sets\npavgroup to NULL with the lcu->lock held.\nFix by checking the pavgroup pointer with lcu->lock held."], "name": "CVE-2022-48636", "package_state": [{"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": "2024-04-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48636\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48636\nhttps://lore.kernel.org/linux-cve-announce/2024042855-CVE-2022-48636-52a7@gregkh/T"], "statement": "No Red Hat products are affected by this vulnerability.", "threat_severity": "Moderate"}

{}