{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50367", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:06.995Z", "datePublished": "2025-09-17T14:56:23.190Z", "dateUpdated": "2026-08-05T08:58:26.099Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:26.099Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: fix UAF/GPF bug in nilfs_mdt_destroy\n\nIn alloc_inode, inode_init_always() could return -ENOMEM if\nsecurity_inode_alloc() fails, which causes inode->i_private\nuninitialized. Then nilfs_is_metadata_file_inode() returns\ntrue and nilfs_free_inode() wrongly calls nilfs_mdt_destroy(),\nwhich frees the uninitialized inode->i_private\nand leads to crashes(e.g., UAF/GPF).\n\nFix this by moving security_inode_alloc just prior to\nthis_cpu_inc(nr_inodes)" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached via local VFS inode allocation on a nilfs2 mount (creat/mkdir/etc. → new_inode → alloc_inode → inode_init_always failure → nilfs_free_inode), not via network packet processing.\nAC:L - An attacker who can allocate nilfs2 inodes can induce GFP_NOFS LSM blob allocation failures under memory pressure (e.g., memcg limits) and recycle slab objects previously used as metadata inodes, reliably driving the uninitialized-i_private free path.\nPR:L - On a system where nilfs2 is already mounted with unprivileged write access (a realistic embedded/NAS deployment), a normal local user can create files and hit the vulnerable alloc/free path without CAP_SYS_ADMIN.\nUI:N - No separate victim action is required; the attacker triggers the flaw themselves by creating inodes on an accessible nilfs2 filesystem under memory pressure.\nS:U - Impact is confined to the local kernel/host authority (standard kernel memory corruption / privilege escalation); it does not cross a VM, IOMMU, or other security boundary.\nC:H - nilfs_mdt_destroy kfree's a stale/dangling i_private pointer (use-after-free / double-free), which can be turned into arbitrary kernel read primitives via heap manipulation.\nI:H - The same UAF/double-free of heap metadata is exploitable for arbitrary kernel writes and control-flow hijacking, enabling full integrity compromise.\nA:H - Freeing an uninitialized or dangling i_private causes kernel GPF/oops/panic even without full exploitation, so availability impact is high." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/inode.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d1ff475d7c83289d0a7faef346ea3bbf90818bad", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c0aa76b0f17f59dd9c9d3463550a2986a1d592e4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ec2aab115eb38ac4992ea2fcc2a02fbe7af5cf48", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "70e4f70d54e0225f91814e8610477d65f33cefe4", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1e555c3ed1fce4b278aaebe18a64a934cece57d8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "64b79e632869ad3ef6c098a4731d559381da1115", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "81de80330fa6907aec32eb54c5619059e6e36452", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2a96b532098284ecf8e4849b8b9e5fc7a28bdee9", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2e488f13755ffbb60f307e991b27024716a33b29", "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/inode.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.331", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.296", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.262", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.218", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.148", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.73", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.15", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.1", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "2.6.12", "versionEndExcluding": "4.9.331" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "4.14.296" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "4.19.262" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.4.218" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.73" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.19.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.0.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d1ff475d7c83289d0a7faef346ea3bbf90818bad" }, { "url": "https://git.kernel.org/stable/c/c0aa76b0f17f59dd9c9d3463550a2986a1d592e4" }, { "url": "https://git.kernel.org/stable/c/ec2aab115eb38ac4992ea2fcc2a02fbe7af5cf48" }, { "url": "https://git.kernel.org/stable/c/70e4f70d54e0225f91814e8610477d65f33cefe4" }, { "url": "https://git.kernel.org/stable/c/1e555c3ed1fce4b278aaebe18a64a934cece57d8" }, { "url": "https://git.kernel.org/stable/c/64b79e632869ad3ef6c098a4731d559381da1115" }, { "url": "https://git.kernel.org/stable/c/81de80330fa6907aec32eb54c5619059e6e36452" }, { "url": "https://git.kernel.org/stable/c/2a96b532098284ecf8e4849b8b9e5fc7a28bdee9" }, { "url": "https://git.kernel.org/stable/c/2e488f13755ffbb60f307e991b27024716a33b29" } ], "title": "fs: fix UAF/GPF bug in nilfs_mdt_destroy", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-50367", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:35:10.102018Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:42:59.212Z" } } ] } }