{"id":"CVE-2022-49926","summary":"net: dsa: Fix possible memory leaks in dsa_loop_init()","details":"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    [\u003c000000006a94f1d5\u003e] kmalloc_trace+0x26/0x60\n    [\u003c00000000a9c44622\u003e] phy_device_create+0x5d/0x970\n    [\u003c00000000d0ee2afc\u003e] get_phy_device+0xf3/0x2b0\n    [\u003c00000000dca0c71f\u003e] __fixed_phy_register.part.0+0x92/0x4e0\n    [\u003c000000008a834798\u003e] fixed_phy_register+0x84/0xb0\n    [\u003c0000000055223fcb\u003e] 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.","modified":"2026-08-12T03:51:27.303000126Z","published":"2025-05-01T14:11:04.691Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49926.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/37a098fc9b42bd7fce66764866aa514639667b6e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4d2024b138d9f7b02ae13ee997fd3a71e9e46254"},{"type":"WEB","url":"https://git.kernel.org/stable/c/633efc8b3dc96f56f5a57f2a49764853a2fa3f50"},{"type":"WEB","url":"https://git.kernel.org/stable/c/935b4beb724946a37cebf97191592d4879d3a3a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f555b1584fc2d5d16ee3c4d9438e93ac7c502c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bbc5d7b46a729bfcbb5544f6612b7a67dd4f4d6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d593e1ede655b74c42e4e4fe285ea64aee96fb5c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49926.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49926"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"98cd1552ea27e512c7e99e2aa76042a26e4fb25c"},{"fixed":"935b4beb724946a37cebf97191592d4879d3a3a3"},{"fixed":"d593e1ede655b74c42e4e4fe285ea64aee96fb5c"},{"fixed":"bbc5d7b46a729bfcbb5544f6612b7a67dd4f4d6f"},{"fixed":"37a098fc9b42bd7fce66764866aa514639667b6e"},{"fixed":"9f555b1584fc2d5d16ee3c4d9438e93ac7c502c7"},{"fixed":"4d2024b138d9f7b02ae13ee997fd3a71e9e46254"},{"fixed":"633efc8b3dc96f56f5a57f2a49764853a2fa3f50"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49926.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"4.14.299"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.224"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.154"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49926.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}