CVE-2024-47699

{"id": "CVE-2024-47699", "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": "2024-10-21T12:15:06.503", "references": [{"url": "https://git.kernel.org/stable/c/1d94dbdfbb64cc48d10dec65cc3c4fbf2497b343", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/21839b6fbc3c41b3e374ecbdb0cabbbb2c53cf34", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/24bf40740a3da6b4056721da34997ae6938f3da1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2b78e9df10fb7f4e9d3d7a18417dd72fbbc1dfd0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3644554d308ddf2669e459a1551a7edf60b2d62b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/73d23ecf234b7a6d47fb883f2dabe10e3230b31d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9403001ad65ae4f4c5de368bdda3a0636b51d51a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/db73500d3f0e558eb642aae1d4782e7726b4a03f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f68523e0f26faade18833fbef577a4295d8e2c94", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential null-ptr-deref in nilfs_btree_insert()\n\nPatch series \"nilfs2: fix potential issues with empty b-tree nodes\".\n\nThis series addresses three potential issues with empty b-tree nodes that\ncan occur with corrupted filesystem images, including one recently\ndiscovered by syzbot.\n\n\nThis patch (of 3):\n\nIf a b-tree is broken on the device, and the b-tree height is greater than\n2 (the level of the root node is greater than 1) even if the number of\nchild nodes of the b-tree root is 0, a NULL pointer dereference occurs in\nnilfs_btree_prepare_insert(), which is called from nilfs_btree_insert().\n\nThis is because, when the number of child nodes of the b-tree root is 0,\nnilfs_btree_do_lookup() does not set the block buffer head in any of\npath[x].bp_bh, leaving it as the initial value of NULL, but if the level\nof the b-tree root node is greater than 1, nilfs_btree_get_nonroot_node(),\nwhich accesses the buffer memory of path[x].bp_bh, is called.\n\nFix this issue by adding a check to nilfs_btree_root_broken(), which\nperforms sanity checks when reading the root node from the device, to\ndetect this inconsistency.\n\nThanks to Lizhi Xu for trying to solve the bug and clarifying the cause\nearly on."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nilfs2: soluciona una posible desreferencia de puntero nulo en nilfs_btree_insert() Serie de parches \"nilfs2: soluciona posibles problemas con nodos de \u00e1rbol b vac\u00edos\". Esta serie aborda tres posibles problemas con nodos de \u00e1rbol b vac\u00edos que pueden ocurrir con im\u00e1genes de sistema de archivos da\u00f1adas, incluido uno descubierto recientemente por syzbot. Este parche (de 3): Si un \u00e1rbol b est\u00e1 roto en el dispositivo y la altura del \u00e1rbol b es mayor que 2 (el nivel del nodo ra\u00edz es mayor que 1) incluso si el n\u00famero de nodos secundarios de la ra\u00edz del \u00e1rbol b es 0, se produce una desreferencia de puntero NULL en nilfs_btree_prepare_insert(), que se llama desde nilfs_btree_insert(). Esto se debe a que, cuando el n\u00famero de nodos secundarios de la ra\u00edz del \u00e1rbol b es 0, nilfs_btree_do_lookup() no establece el encabezado del b\u00fafer de bloque en ninguno de los path[x].bp_bh, dej\u00e1ndolo como el valor inicial de NULL, pero si el nivel del nodo ra\u00edz del \u00e1rbol b es mayor que 1, se llama a nilfs_btree_get_nonroot_node(), que accede a la memoria del b\u00fafer de path[x].bp_bh. Solucione este problema agregando una verificaci\u00f3n a nilfs_btree_root_broken(), que realiza verificaciones de cordura al leer el nodo ra\u00edz desde el dispositivo, para detectar esta inconsistencia. Gracias a Lizhi Xu por intentar resolver el error y aclarar la causa desde el principio."}], "lastModified": "2024-11-08T16:15:25.643", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D7AC25F3-FCB6-413C-966C-A41D588398BE", "versionEndExcluding": "5.10.227", "versionStartIncluding": "2.6.30"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C", "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE", "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D448821D-C085-4CAF-88FA-2DDE7BE21976", "versionEndExcluding": "6.6.54", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CE94BB8D-B0AB-4563-9ED7-A12122B56EBE", "versionEndExcluding": "6.10.13", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB755D26-97F4-43B6-8604-CD076811E181", "versionEndExcluding": "6.11.2", "versionStartIncluding": "6.11"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}