CVE-2023-53294 - Vulnerability Details

- fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup()

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.

Published: 2025-09-16

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`4342306f0f0d5ff4315a204d315c1b51b914fca5`	affected	< f8d9e062a695a3665c4635c4f216a75912687598
`4342306f0f0d5ff4315a204d315c1b51b914fca5`	affected	< d69d5e2a81df94534bdb468bcdd26060fcb7191a
`4342306f0f0d5ff4315a204d315c1b51b914fca5`	affected	< 2ba22cbc6a1cf4b58195adbee0b80262e53992d3
`4342306f0f0d5ff4315a204d315c1b51b914fca5`	affected	< e78240bc4b94fc42854d65e657bb998100cc8e1b
`4342306f0f0d5ff4315a204d315c1b51b914fca5`	affected	< 254e69f284d7270e0abdc023ee53b71401c3ba0c

Linux

affected

Version	Status	Constraints
`5.15`	affected	—
`0`	unaffected	< 5.15
`5.15.112`	unaffected	≤ 5.15.*
`6.1.29`	unaffected	≤ 6.1.*
`6.2.16`	unaffected	≤ 6.2.*
`6.3.3`	unaffected	≤ 6.3.*
`6.4`	unaffected	≤ *

Configuration 1 [-]

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

No data.

Vendor	Product	Confidence	Versions
Linux	Linux Kernel	—	—

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2023-59895	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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00017.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://git.kernel.org/stable/c/254e69f284d7270e0abdc023ee53b71401c3ba0c
https://git.kernel.org/stable/c/2ba22cbc6a1cf4b58195adbee0b80262e53992d3
https://git.kernel.org/stable/c/d69d5e2a81df94534bdb468bcdd26060fcb7191a
https://git.kernel.org/stable/c/e78240bc4b94fc42854d65e657bb998100cc8e1b
https://git.kernel.org/stable/c/f8d9e062a695a3665c4635c4f216a75912687598
https://lore.kernel.org/linux-cve-announce/2025091627-CVE-2023-53294-e5cc@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-53294
https://www.cve.org/CVERecord?id=CVE-2023-53294

History

Wed, 14 Jan 2026 19:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 02 Dec 2025 19:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-476
CPEs		cpe:2.3:o:linux:linux_kernel::::::::

Wed, 17 Sep 2025 11:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
Vendors & Products		Linux Linux linux Kernel

Wed, 17 Sep 2025 00:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025091627-CVE-2023-53294-e5cc@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2023-53294 https://www.cve.org/CVERecord?id=CVE-2023-53294
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Tue, 16 Sep 2025 08:15:00 +0000

Type	Values Removed	Values Added
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.
Title		fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup()
References		https://git.kernel.org/stable/c/254e69f284d7270e0abdc023ee53b71401c3ba0c https://git.kernel.org/stable/c/2ba22cbc6a1cf4b58195adbee0b80262e53992d3 https://git.kernel.org/stable/c/d69d5e2a81df94534bdb468bcdd26060fcb7191a https://git.kernel.org/stable/c/e78240bc4b94fc42854d65e657bb998100cc8e1b https://git.kernel.org/stable/c/f8d9e062a695a3665c4635c4f216a75912687598

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-09-16T08:11:26.926Z

Updated: 2026-05-11T19:42:09.734Z

Reserved: 2025-09-16T08:09:37.992Z

Link: CVE-2023-53294

Vulnrichment

Updated: 2026-01-14T18:11:37.322Z

NVD

Status : Modified

Published: 2025-09-16T08:15:38.683

Modified: 2026-01-14T19:16:21.480

Link: CVE-2023-53294

Redhat

Severity : Moderate

Publid Date: 2025-09-16T00:00:00Z

Links: CVE-2023-53294 - Bugzilla

OpenCVE Enrichment

Updated: 2025-09-17T10:05:00Z

Weaknesses

CWE-476

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Subscriptions

JSON object

JSON object

JSON object

JSON object

JSON object