{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50751","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-24T13:02:21.544Z","datePublished":"2025-12-24T13:05:46.159Z","dateUpdated":"2026-05-11T19:24:49.023Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:24:49.023Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nconfigfs: fix possible memory leak in configfs_create_dir()\n\nkmemleak reported memory leaks in configfs_create_dir():\n\nunreferenced object 0xffff888009f6af00 (size 192):\n  comm \"modprobe\", pid 3777, jiffies 4295537735 (age 233.784s)\n  backtrace:\n    kmem_cache_alloc (mm/slub.c:3250 mm/slub.c:3256 mm/slub.c:3263 mm/slub.c:3273)\n    new_fragment (./include/linux/slab.h:600 fs/configfs/dir.c:163)\n    configfs_register_subsystem (fs/configfs/dir.c:1857)\n    basic_write (drivers/hwtracing/stm/p_basic.c:14) stm_p_basic\n    do_one_initcall (init/main.c:1296)\n    do_init_module (kernel/module/main.c:2455)\n    ...\n\nunreferenced object 0xffff888003ba7180 (size 96):\n  comm \"modprobe\", pid 3777, jiffies 4295537735 (age 233.784s)\n  backtrace:\n    kmem_cache_alloc (mm/slub.c:3250 mm/slub.c:3256 mm/slub.c:3263 mm/slub.c:3273)\n    configfs_new_dirent (./include/linux/slab.h:723 fs/configfs/dir.c:194)\n    configfs_make_dirent (fs/configfs/dir.c:248)\n    configfs_create_dir (fs/configfs/dir.c:296)\n    configfs_attach_group.isra.28 (fs/configfs/dir.c:816 fs/configfs/dir.c:852)\n    configfs_register_subsystem (fs/configfs/dir.c:1881)\n    basic_write (drivers/hwtracing/stm/p_basic.c:14) stm_p_basic\n    do_one_initcall (init/main.c:1296)\n    do_init_module (kernel/module/main.c:2455)\n    ...\n\nThis is because the refcount is not correct in configfs_make_dirent().\nFor normal stage, the refcount is changing as:\n\nconfigfs_register_subsystem()\n  configfs_create_dir()\n    configfs_make_dirent()\n      configfs_new_dirent() # set s_count = 1\n      dentry->d_fsdata = configfs_get(sd); # s_count = 2\n...\nconfigfs_unregister_subsystem()\n  configfs_remove_dir()\n    remove_dir()\n      configfs_remove_dirent() # s_count = 1\n    dput() ...\n      *dentry_unlink_inode()*\n        configfs_d_iput() # s_count = 0, release\n\nHowever, if we failed in configfs_create():\n\nconfigfs_register_subsystem()\n  configfs_create_dir()\n    configfs_make_dirent() # s_count = 2\n    ...\n    configfs_create() # fail\n    ->out_remove:\n    configfs_remove_dirent(dentry)\n      configfs_put(sd) # s_count = 1\n      return PTR_ERR(inode);\n\nThere is no inode in the error path, so the configfs_d_iput() is lost\nand makes sd and fragment memory leaked.\n\nTo fix this, when we failed in configfs_create(), manually call\nconfigfs_put(sd) to keep the refcount correct."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/configfs/dir.c"],"versions":[{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"90c38f57a821499391526b15cc944c265bd24e48","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"74ac7c9ee2d486c501e7864c903f5098fc477acd","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"07f82dca112262b169bec0001378126439cab776","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"8bc77754224a2c8581727ffe2e958119b4e27c8f","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"c72eb6e6e49a71f7598740786568fafdd013a227","status":"affected","versionType":"git"},{"version":"7063fbf2261194f72ee75afca67b3b38b554b5fa","lessThan":"c65234b283a65cfbfc94619655e820a5e55199eb","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/configfs/dir.c"],"versions":[{"version":"2.6.16","status":"affected"},{"version":"0","lessThan":"2.6.16","status":"unaffected","versionType":"semver"},{"version":"5.4.229","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.163","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.86","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.0.16","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1.2","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.15.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/90c38f57a821499391526b15cc944c265bd24e48"},{"url":"https://git.kernel.org/stable/c/74ac7c9ee2d486c501e7864c903f5098fc477acd"},{"url":"https://git.kernel.org/stable/c/07f82dca112262b169bec0001378126439cab776"},{"url":"https://git.kernel.org/stable/c/8bc77754224a2c8581727ffe2e958119b4e27c8f"},{"url":"https://git.kernel.org/stable/c/c72eb6e6e49a71f7598740786568fafdd013a227"},{"url":"https://git.kernel.org/stable/c/c65234b283a65cfbfc94619655e820a5e55199eb"}],"title":"configfs: fix possible memory leak in configfs_create_dir()","x_generator":{"engine":"bippy-1.2.0"}}}}