CVE-2021-46924

{"id": "CVE-2021-46924", "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": "2024-02-27T10:15:07.150", "references": [{"url": "https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4", "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\nNFC: st21nfca: Fix memory leak in device probe and remove\n\n'phy->pending_skb' is alloced when device probe, but forgot to free\nin the error handling path and remove path, this cause memory leak\nas follows:\n\nunreferenced object 0xffff88800bc06800 (size 512):\n comm \"8\", pid 11775, jiffies 4295159829 (age 9.032s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n backtrace:\n [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450\n [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0\n [<000000005fea522c>] __alloc_skb+0x124/0x380\n [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2\n\nFix it by freeing 'pending_skb' in error and remove."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: NFC: st21nfca: corrige la p\u00e9rdida de memoria en la sonda del dispositivo y elimina 'phy-&gt;pending_skb' cuando se asigna la sonda del dispositivo, pero olvid\u00f3 liberarla en la ruta de manejo de errores y eliminar la ruta, esto causa p\u00e9rdida de memoria de la siguiente manera: objeto sin referencia 0xffff88800bc06800 (tama\u00f1o 512): comunicaci\u00f3n \"8\", pid 11775, santiago 4295159829 (edad 9.032 s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................. backtrace: [&lt;00000000d66c09ce&gt;] __kmalloc_node_track_caller+0x1ed/0x450 [&lt;00000000c93382b3&gt;] kmalloc_reserve+0x37/0xd0 [&lt;000000005fea522c&gt;] __alloc_skb+0x124/0x380 [ &lt;0000000019f29f9a&gt;] st21nfca_hci_i2c_probe+0x170/0x8f2 Solucionarlo liberando 'pending_skb' por error y elim\u00ednelo."}], "lastModified": "2024-04-10T15:23:33.673", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8A00E6D4-E196-4382-BAC7-C4BAC5A9CFAA", "versionEndExcluding": "4.14.261", "versionStartIncluding": "3.16.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B34A1353-506A-4AB9-87EC-CD50F09DFB8A", "versionEndExcluding": "4.19.224", "versionStartIncluding": "4.15.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "56D16FBB-453E-4316-A027-E517828203D7", "versionEndExcluding": "5.4.170", "versionStartIncluding": "4.20.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C87FB3FD-3E74-4588-A1A4-B9BA8AE0C06B", "versionEndExcluding": "5.10.90", "versionStartIncluding": "5.5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "083E0940-932B-447B-A6B2-677DAE27FD04", "versionEndExcluding": "5.15.13", "versionStartIncluding": "5.11.0"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}