{"id":"CVE-2023-53294","summary":"fs/ntfs3: Fix null-ptr-deref on inode-\u003ei_op in ntfs_lookup()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix null-ptr-deref on inode-\u003ei_op in ntfs_lookup()\n\nSyzbot reported a null-ptr-deref bug:\n\nntfs3: loop0: Different NTFS' sector size (1024) and media sector size\n(512)\nntfs3: loop0: Mark volume as dirty due to NTFS errors\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\nRIP: 0010:d_flags_for_inode fs/dcache.c:1980 [inline]\nRIP: 0010:__d_add+0x5ce/0x800 fs/dcache.c:2796\nCall Trace:\n \u003cTASK\u003e\n d_splice_alias+0x122/0x3b0 fs/dcache.c:3191\n lookup_open fs/namei.c:3391 [inline]\n open_last_lookups fs/namei.c:3481 [inline]\n path_openat+0x10e6/0x2df0 fs/namei.c:3688\n do_filp_open+0x264/0x4f0 fs/namei.c:3718\n do_sys_openat2+0x124/0x4e0 fs/open.c:1310\n do_sys_open fs/open.c:1326 [inline]\n __do_sys_open fs/open.c:1334 [inline]\n __se_sys_open fs/open.c:1330 [inline]\n __x64_sys_open+0x221/0x270 fs/open.c:1330\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nIf the MFT record of ntfs inode is not a base record, inode-\u003ei_op can be\nNULL. And a null-ptr-deref may happen:\n\nntfs_lookup()\n    dir_search_u() # inode-\u003ei_op is set to NULL\n    d_splice_alias()\n        __d_add()\n            d_flags_for_inode() # inode-\u003ei_op-\u003eget_link null-ptr-deref\n\nFix this by adding a Check on inode-\u003ei_op before calling the\nd_splice_alias() function.","modified":"2026-04-02T09:43:56.647318Z","published":"2025-09-16T08:11:26.926Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53294.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/254e69f284d7270e0abdc023ee53b71401c3ba0c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2ba22cbc6a1cf4b58195adbee0b80262e53992d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d69d5e2a81df94534bdb468bcdd26060fcb7191a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e78240bc4b94fc42854d65e657bb998100cc8e1b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f8d9e062a695a3665c4635c4f216a75912687598"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53294.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53294"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4342306f0f0d5ff4315a204d315c1b51b914fca5"},{"fixed":"f8d9e062a695a3665c4635c4f216a75912687598"},{"fixed":"d69d5e2a81df94534bdb468bcdd26060fcb7191a"},{"fixed":"2ba22cbc6a1cf4b58195adbee0b80262e53992d3"},{"fixed":"e78240bc4b94fc42854d65e657bb998100cc8e1b"},{"fixed":"254e69f284d7270e0abdc023ee53b71401c3ba0c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53294.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}