CVE-2023-53294
fs/ntfs3: Fix null-ptr-deref on inode->i_op in ntfs_lookup()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 – < f8d9e062a695a3665c4635c4f216a75912687598
- affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 – < d69d5e2a81df94534bdb468bcdd26060fcb7191a
- affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 – < 2ba22cbc6a1cf4b58195adbee0b80262e53992d3
- affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 – < e78240bc4b94fc42854d65e657bb998100cc8e1b
- affected 4342306f0f0d5ff4315a204d315c1b51b914fca5 – < 254e69f284d7270e0abdc023ee53b71401c3ba0c
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.112 – ≤ 5.15.*
- unaffected 6.1.29 – ≤ 6.1.*
- unaffected 6.2.16 – ≤ 6.2.*
- unaffected 6.3.3 – ≤ 6.3.*
- unaffected 6.4 – ≤ *
References (5)
- https://git.kernel.org/stable/c/f8d9e062a695a3665c4635c4f216a75912687598 (opens in a new tab)
- https://git.kernel.org/stable/c/d69d5e2a81df94534bdb468bcdd26060fcb7191a (opens in a new tab)
- https://git.kernel.org/stable/c/2ba22cbc6a1cf4b58195adbee0b80262e53992d3 (opens in a new tab)
- https://git.kernel.org/stable/c/e78240bc4b94fc42854d65e657bb998100cc8e1b (opens in a new tab)
- https://git.kernel.org/stable/c/254e69f284d7270e0abdc023ee53b71401c3ba0c (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2023-53294)Record last updated .