{"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": "2025-12-24T13:05:46.159Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-24T13:05:46.159Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2022-50751", "lastModified": "2025-12-29T15:58:34.503", "metrics": {}, "published": "2025-12-24T13:16:01.823", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07f82dca112262b169bec0001378126439cab776"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/74ac7c9ee2d486c501e7864c903f5098fc477acd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8bc77754224a2c8581727ffe2e958119b4e27c8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/90c38f57a821499391526b15cc944c265bd24e48"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c65234b283a65cfbfc94619655e820a5e55199eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c72eb6e6e49a71f7598740786568fafdd013a227"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: configfs: fix possible memory leak in configfs_create_dir()", "id": "2425159", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2425159"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50751", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50751\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50751\nhttps://lore.kernel.org/linux-cve-announce/2025122452-CVE-2022-50751-b5ed@gregkh/T"], "threat_severity": "Low"}

{}