{"cve":"CVE-2022-50578","nvd":{"published":"2025-10-22T14:15:42.803","modified":"2026-06-17T05:23:49.567","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nclass: fix possible memory leak in __class_register()\n\nIf class_add_groups() returns error, the 'cp->subsys' need be\nunregister, and the 'cp' need be freed.\n\nWe can not call kset_unregister() here, because the 'cls' will\nbe freed in callback function class_release() and it's also\nfreed in caller's error path, it will cause double free.\n\nSo fix this by calling kobject_del() and kfree_const(name) to\ncleanup kobject. Besides, call kfree() to free the 'cp'.\n\nFault injection test can trigger this:\n\nunreferenced object 0xffff888102fa8190 (size 8):\n  comm \"modprobe\", pid 502, jiffies 4294906074 (age 49.296s)\n  hex dump (first 8 bytes):\n    70 6b 74 63 64 76 64 00                          pktcdvd.\n  backtrace:\n    [<00000000e7c7703d>] __kmalloc_track_caller+0x1ae/0x320\n    [<000000005e4d70bc>] kstrdup+0x3a/0x70\n    [<00000000c2e5e85a>] kstrdup_const+0x68/0x80\n    [<000000000049a8c7>] kvasprintf_const+0x10b/0x190\n    [<0000000029123163>] kobject_set_name_vargs+0x56/0x150\n    [<00000000747219c9>] kobject_set_name+0xab/0xe0\n    [<0000000005f1ea4e>] __class_register+0x15c/0x49a\n\nunreferenced object 0xffff888037274000 (size 1024):\n  comm \"modprobe\", pid 502, jiffies 4294906074 (age 49.296s)\n  hex dump (first 32 bytes):\n    00 40 27 37 80 88 ff ff 00 40 27 37 80 88 ff ff  .@'7.....@'7....\n    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........\n  backtrace:\n    [<00000000151f9600>] kmem_cache_alloc_trace+0x17c/0x2f0\n    [<00000000ecf3dd95>] __class_register+0x86/0x49a","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/18a7200646958cf8e1b8a933de08122fc50676cd","https://git.kernel.org/stable/c/3bb9c92c27624ad076419a70f2b1a30cd1f8bbbd","https://git.kernel.org/stable/c/3e0efc3f3f5e5c73996782f8db69963e501bb878","https://git.kernel.org/stable/c/417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7","https://git.kernel.org/stable/c/4efa5443817c1b6de22d401aeca5b2481e835f8c"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:12:35.277909958+00:00"},"epss":{"cve":"CVE-2022-50578","score":0.00242,"percentile":0.15418,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}