CVE-2023-53294

MEDIUM EPSS 3.3%
Published Sep 16, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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: <TASK> 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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <5.15.112
linuxlinux_kernel*≥5.16  –  <6.1.29
linuxlinux_kernel*≥6.2  –  <6.2.16
linuxlinux_kernel*≥6.3  –  <6.3.3

References 5

  • git.kernel.org https://git.kernel.org/stable/c/254e69f284d7270e0abdc023ee53b71401c3ba0c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2ba22cbc6a1cf4b58195adbee0b80262e53992d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d69d5e2a81df94534bdb468bcdd26060fcb7191a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e78240bc4b94fc42854d65e657bb998100cc8e1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8d9e062a695a3665c4635c4f216a75912687598
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/254e69f284d7270e0abdc023ee53b71401c3ba0c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2ba22cbc6a1cf4b58195adbee0b80262e53992d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d69d5e2a81df94534bdb468bcdd26060fcb7191a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e78240bc4b94fc42854d65e657bb998100cc8e1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8d9e062a695a3665c4635c4f216a75912687598
    Patch