CVE-2022-49926

{"id": "CVE-2022-49926", "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": "2025-05-01T15:16:18.440", "references": [{"url": "https://git.kernel.org/stable/c/37a098fc9b42bd7fce66764866aa514639667b6e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4d2024b138d9f7b02ae13ee997fd3a71e9e46254", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/633efc8b3dc96f56f5a57f2a49764853a2fa3f50", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/935b4beb724946a37cebf97191592d4879d3a3a3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9f555b1584fc2d5d16ee3c4d9438e93ac7c502c7", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bbc5d7b46a729bfcbb5544f6612b7a67dd4f4d6f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d593e1ede655b74c42e4e4fe285ea64aee96fb5c", "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\nnet: dsa: Fix possible memory leaks in dsa_loop_init()\n\nkmemleak reported memory leaks in dsa_loop_init():\n\nkmemleak: 12 new suspected memory leaks\n\nunreferenced object 0xffff8880138ce000 (size 2048):\n comm \"modprobe\", pid 390, jiffies 4295040478 (age 238.976s)\n backtrace:\n [<000000006a94f1d5>] kmalloc_trace+0x26/0x60\n [<00000000a9c44622>] phy_device_create+0x5d/0x970\n [<00000000d0ee2afc>] get_phy_device+0xf3/0x2b0\n [<00000000dca0c71f>] __fixed_phy_register.part.0+0x92/0x4e0\n [<000000008a834798>] fixed_phy_register+0x84/0xb0\n [<0000000055223fcb>] dsa_loop_init+0xa9/0x116 [dsa_loop]\n ...\n\nThere are two reasons for memleak in dsa_loop_init().\n\nFirst, fixed_phy_register() create and register phy_device:\n\nfixed_phy_register()\n get_phy_device()\n phy_device_create() # freed by phy_device_free()\n phy_device_register() # freed by phy_device_remove()\n\nBut fixed_phy_unregister() only calls phy_device_remove().\nSo the memory allocated in phy_device_create() is leaked.\n\nSecond, when mdio_driver_register() fail in dsa_loop_init(),\nit just returns and there is no cleanup for phydevs.\n\nFix the problems by catching the error of mdio_driver_register()\nin dsa_loop_init(), then calling both fixed_phy_unregister() and\nphy_device_free() to release phydevs.\nAlso add a function for phydevs cleanup to avoid duplacate."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: Se corrigen posibles fugas de memoria en dsa_loop_init() kmemleak inform\u00f3 de fugas de memoria en dsa_loop_init(): kmemleak: 12 nuevas fugas de memoria sospechosas objeto no referenciado 0xffff8880138ce000 (tama\u00f1o 2048): comm \"modprobe\", pid 390, jiffies 4295040478 (edad 238,976 s) backtrace: [&lt;000000006a94f1d5&gt;] kmalloc_trace+0x26/0x60 [&lt;00000000a9c44622&gt;] phy_device_create+0x5d/0x970 [&lt;00000000d0ee2afc&gt;] Hay dos razones para la p\u00e9rdida de memoria en dsa_loop_init(). Primero, fixed_phy_register() crea y registra phy_device: fixed_phy_register() get_phy_device() phy_device_create() # liberado por phy_device_free() phy_device_register() # liberado por phy_device_remove() Pero fixed_phy_unregister() solo llama a phy_device_remove(). Por lo tanto, la memoria asignada en phy_device_create() se filtra. Segundo, cuando mdio_driver_register() falla en dsa_loop_init(), simplemente regresa y no hay limpieza para phydevs. Solucione los problemas capturando el error de mdio_driver_register() en dsa_loop_init(), luego llame a fixed_phy_unregister() y phy_device_free() para liberar phydevs. Tambi\u00e9n agregue una funci\u00f3n para la limpieza de phydevs para evitar la duplicaci\u00f3n."}], "lastModified": "2025-05-07T13:28:34.500", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D2CFDFB9-7D89-4036-A84B-B2E8E20CA6EF", "versionEndExcluding": "4.14.299", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ABED5D97-9B16-4CF6-86E3-D5F5C4358E35", "versionEndExcluding": "4.19.265", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D67A077-EB45-4ADE-94CD-F9A76F6C319C", "versionEndExcluding": "5.4.224", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "475D097C-AB5A-4CF5-899F-413077854ABD", "versionEndExcluding": "5.10.154", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB8B27B9-B41B-42D5-AE67-0A89A8A8EEB1", "versionEndExcluding": "5.15.78", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EC9A754E-625D-42F3-87A7-960D643E2867", "versionEndExcluding": "6.0.8", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}