{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-68369", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.309Z", "datePublished": "2025-12-24T10:32:55.440Z", "dateUpdated": "2026-08-05T12:11:05.018Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:11:05.018Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: init run lock for extend inode\n\nAfter setting the inode mode of $Extend to a regular file, executing the\ntruncate system call will enter the do_truncate() routine, causing the\nrun_lock uninitialized error reported by syzbot.\n\nPrior to patch 4e8011ffec79, if the inode mode of $Extend was not set to\na regular file, the do_truncate() routine would not be entered.\n\nAdd the run_lock initialization when loading $Extend.\n\nsyzbot reported:\nINFO: trying to register non-static key.\nCall Trace:\n dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120\n assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:984\n register_lock_class+0x105/0x320 kernel/locking/lockdep.c:1299\n __lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112\n lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868\n down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590\n ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:860\n ntfs_extend+0x1d9/0x970 fs/ntfs3/file.c:387\n ntfs_setattr+0x2e8/0xbe0 fs/ntfs3/file.c:808" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - ntfs3 supports NFS export, allowing an RW-exported volume to be reached through NFS LOOKUP and SETATTR. The RPC path reaches nfsd_setattr(), notify_change(), ntfs_setattr(), and ntfs_set_size() without opening the metadata file.\nAC:L - Standard NTFS volumes contain affected $Extend children, and a size-increasing SETATTR directly reaches the bad lock. On PREEMPT_RT the zeroed rwsem deterministically blocks; no race or malformed filesystem is required.\nPR:N - A writable anonymous NFS export can map RPC_AUTH_NULL to the NTFS mount UID, after which nfsd's owner override permits ATTR_SIZE despite mode 000. The remote caller needs no target account or capability.\nUI:N - Once the NTFS volume is mounted and exported, the attacker triggers the flaw directly with network requests; no victim action is required.\nS:U - The flaw compromises availability within the kernel and its NFS service without crossing a VM, IOMMU, or separate security-authority boundary.\nC:N - ntfs_alloc_inode() zeroes the relevant union, so no uninitialized contents are disclosed. The missing initialization creates an invalid synchronization object but no memory-read primitive.\nI:N - There is no use-after-free, out-of-bounds access, type confusion, or attacker-controlled write. The RT path blocks before attr_set_size(), while affected metadata records lack the unnamed data attribute needed for a successful size change.\nA:H - On PREEMPT_RT, a valid rwsem requires READER_BIAS, but the zeroed lock causes down_write() to wait indefinitely after subtracting that bias. Repeated SETATTR requests can occupy the remaining nfsd threads behind the held inode lock, causing complete NFS-service loss." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/inode.c" ], "versions": [ { "version": "63eb6730ce0604d3eacf036c2f68ea70b068317c", "lessThan": "79c8a77b1782e2ace96d063be3c41ba540d1e20a", "status": "affected", "versionType": "git" }, { "version": "78d46f5276ed3589aaaa435580068c5b62efc921", "lessThan": "433d1f7c628c3cbdd7efce064d6c7acd072cf6c4", "status": "affected", "versionType": "git" }, { "version": "17249b2a65274f73ed68bcd1604e08a60fd8a278", "lessThan": "907bf69c6b6ce5d038eec7a599d67b45b62624bc", "status": "affected", "versionType": "git" }, { "version": "37f65e68ba9852dc51c78dbb54a9881c3f0fe4f7", "lessThan": "6e17555728bc469d484c59db4a0abc65c19bc315", "status": "affected", "versionType": "git" }, { "version": "57534db1bbc4ca772393bb7d92e69d5e7b9051cf", "lessThan": "19164d8228317f3f1fe2662a9ba587cfe3b2d29e", "status": "affected", "versionType": "git" }, { "version": "4e8011ffec79717e5fdac43a7e79faf811a384b7", "lessThan": "ab5e8ebeee1caa4fcf8be7d8d62c0a7165469076", "status": "affected", "versionType": "git" }, { "version": "4e8011ffec79717e5fdac43a7e79faf811a384b7", "lessThan": "be99c62ac7e7af514e4b13f83c891a3cccefaa48", "status": "affected", "versionType": "git" }, { "version": "5.15.197", "lessThan": "5.15.198", "status": "affected", "versionType": "semver" }, { "version": "6.1.159", "lessThan": "6.1.160", "status": "affected", "versionType": "semver" }, { "version": "6.6.117", "lessThan": "6.6.120", "status": "affected", "versionType": "semver" }, { "version": "6.12.58", "lessThan": "6.12.63", "status": "affected", "versionType": "semver" }, { "version": "6.17.8", "lessThan": "6.17.13", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/inode.c" ], "versions": [ { "version": "6.18", "status": "affected" }, { "version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.63", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.13", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "5.15.197", "versionEndExcluding": "5.15.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.159", "versionEndExcluding": "6.1.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.117", "versionEndExcluding": "6.6.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.58", "versionEndExcluding": "6.12.63" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17.8", "versionEndExcluding": "6.17.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.18.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/79c8a77b1782e2ace96d063be3c41ba540d1e20a" }, { "url": "https://git.kernel.org/stable/c/433d1f7c628c3cbdd7efce064d6c7acd072cf6c4" }, { "url": "https://git.kernel.org/stable/c/907bf69c6b6ce5d038eec7a599d67b45b62624bc" }, { "url": "https://git.kernel.org/stable/c/6e17555728bc469d484c59db4a0abc65c19bc315" }, { "url": "https://git.kernel.org/stable/c/19164d8228317f3f1fe2662a9ba587cfe3b2d29e" }, { "url": "https://git.kernel.org/stable/c/ab5e8ebeee1caa4fcf8be7d8d62c0a7165469076" }, { "url": "https://git.kernel.org/stable/c/be99c62ac7e7af514e4b13f83c891a3cccefaa48" } ], "title": "ntfs3: init run lock for extend inode", "x_generator": { "engine": "bippy-1.2.0" } } } }