CVE-2024-50041

{"id": "CVE-2024-50041", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-10-21T20:15:17.133", "references": [{"url": "https://git.kernel.org/stable/c/703c4d820b31bcadf465288d5746c53445f02a55", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/8831abff1bd5b6bc8224f0c0671f46fbd702b5b2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9a9747288ba0a9ad4f5c9877f18dd245770ad64e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9db6ce9e2738b05a3672aff4d42169cf3bb5a3e3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix macvlan leak by synchronizing access to mac_filter_hash\n\nThis patch addresses a macvlan leak issue in the i40e driver caused by\nconcurrent access to vsi->mac_filter_hash. The leak occurs when multiple\nthreads attempt to modify the mac_filter_hash simultaneously, leading to\ninconsistent state and potential memory leaks.\n\nTo fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing\nvf->default_lan_addr.addr with spin_lock/unlock_bh(&vsi->mac_filter_hash_lock),\nensuring atomic operations and preventing concurrent access.\n\nAdditionally, we add lockdep_assert_held(&vsi->mac_filter_hash_lock) in\ni40e_add_mac_filter() to help catch similar issues in the future.\n\nReproduction steps:\n1. Spawn VFs and configure port vlan on them.\n2. Trigger concurrent macvlan operations (e.g., adding and deleting\n\tportvlan and/or mac filters).\n3. Observe the potential memory leak and inconsistent state in the\n\tmac_filter_hash.\n\nThis synchronization ensures the integrity of the mac_filter_hash and prevents\nthe described leak."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i40e: Corregir p\u00e9rdida de macvlan sincronizando el acceso a mac_filter_hash Este parche soluciona un problema de p\u00e9rdida de macvlan en el controlador i40e causado por el acceso simult\u00e1neo a vsi->mac_filter_hash. La p\u00e9rdida se produce cuando varios subprocesos intentan modificar mac_filter_hash simult\u00e1neamente, lo que genera un estado inconsistente y posibles p\u00e9rdidas de memoria. Para solucionar esto, ahora envolvemos las llamadas a i40e_del_mac_filter() y ponemos a cero vf->default_lan_addr.addr con spin_lock/unlock_bh(&vsi->mac_filter_hash_lock), lo que garantiza operaciones at\u00f3micas y evita el acceso simult\u00e1neo. Adem\u00e1s, agregamos lockdep_assert_held(&vsi->mac_filter_hash_lock) en i40e_add_mac_filter() para ayudar a detectar problemas similares en el futuro. Pasos de reproducci\u00f3n: 1. Genere VFs y configure el puerto VLAN en ellos. 2. Active operaciones MACVLAN simult\u00e1neas (por ejemplo, agregar y eliminar filtros MAC o PortVLAN). 3. Observe la posible p\u00e9rdida de memoria y el estado inconsistente en el hash de filtro MAC. Esta sincronizaci\u00f3n garantiza la integridad del hash de filtro MAC y evita la p\u00e9rdida descrita."}], "lastModified": "2024-10-24T19:31:39.373", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D9429645-5F5B-486E-877E-5F2E0EB6202F", "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.15.54"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3F904485-FC3F-4533-8CD9-B8208F0C4707", "versionEndExcluding": "5.19", "versionStartIncluding": "5.18.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D848431-3C7A-4C40-BC35-515047E89ABE", "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "05D83DB8-7465-4F88-AFB2-980011992AC1", "versionEndExcluding": "6.6.57", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AA84D336-CE9A-4535-B901-1AD77EC17C34", "versionEndExcluding": "6.11.4", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}