cbcvebase.
CVE-2023-53294
published 2025-09-16

CVE-2023-53294: In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup() Syzbot reported a…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.14%
3.4th percentile
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup() Syzbot reported a null-ptr-deref bug: ntfs3: loop0: Different NTFS' sector size (1024) and media sector size (512) ntfs3: loop0: Mark volume as dirty due to NTFS errors general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] RIP: 0010:d_flags_for_inode fs/dcache.c:1980 [inline] RIP: 0010:__d_add+0x5ce/0x800 fs/dcache.c:2796 Call Trace: d_splice_alias+0x122/0x3b0 fs/dcache.c:3191 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3688 do_filp_open+0x264/0x4f0 fs/namei.c:3718 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_open fs/open.c:1334 [inline] __se_sys_open fs/open.c:1330 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1330 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd If the MFT record of ntfs inode is not a base record, inode->i_op can be NULL. And a null-ptr-deref may happen: ntfs_lookup() dir_search_u() # inode->i_op is set to NULL d_splice_alias() __d_add() d_flags_for_inode() # inode->i_op->get_link null-ptr-deref Fix this by adding a Check on inode->i_op before calling the d_splice_alias() function.

Affected

14 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.37-1 (bookworm)linux 6.1.37-1 (bookworm)
linuxlinux——
linuxlinux>= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < f8d9e062a695a3665c4635c4f216a75912687598f8d9e062a695a3665c4635c4f216a75912687598
linuxlinux>= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < d69d5e2a81df94534bdb468bcdd26060fcb7191ad69d5e2a81df94534bdb468bcdd26060fcb7191a
linuxlinux>= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 2ba22cbc6a1cf4b58195adbee0b80262e53992d32ba22cbc6a1cf4b58195adbee0b80262e53992d3
linuxlinux>= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < e78240bc4b94fc42854d65e657bb998100cc8e1be78240bc4b94fc42854d65e657bb998100cc8e1b
linuxlinux>= 4342306f0f0d5ff4315a204d315c1b51b914fca5 < 254e69f284d7270e0abdc023ee53b71401c3ba0c254e69f284d7270e0abdc023ee53b71401c3ba0c
linuxlinux_kernel>= 0 < 6.1.37-16.1.37-1
linuxlinux_kernel>= 0 < 6.3.7-16.3.7-1
linuxlinux_kernel>= 0 < 6.3.7-16.3.7-1
linuxlinux_kernel>= 5.15 < 5.15.1125.15.112
linuxlinux_kernel>= 5.16 < 6.1.296.1.29
linuxlinux_kernel>= 6.2 < 6.2.166.2.16
linuxlinux_kernel>= 6.3 < 6.3.36.3.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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