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🛡️ CVE-2022-50442 — kernel

🟠 CVSS 8.4 — High ✅ No Known Exploit NVD
8.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

fs/ntfs3: Validate buffer length while parsing index

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: Validate buffer length while parsing index

indx_read is called when we have some NTFS directory operations that

need more information from the index buffers. This adds a sanity check

to make sure the returned index buffer length is legit, or we may have

some out-of-bound memory accesses.

[ 560.897595] BUG: KASAN: slab-out-of-bounds in hdr_find_e.isra.0+0x10c/0x320

[ 560.898321] Read of size 2 at addr ffff888009497238 by task exp/245

[ 560.898760]

[ 560.899129] CPU: 0 PID: 245 Comm: exp Not tainted 6.0.0-rc6 #37

[ 560.899505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014

[ 560.900170] Call Trace:

[ 560.900407] <TASK>

[ 560.900732] dump_stack_lvl+0x49/0x63

[ 560.901108] print_report.cold+0xf5/0x689

[ 560.901395] ? hdr_find_e.isra.0+0x10c/0x320

[ 560.901716] kasan_report+0xa7/0x130

[ 560.901950] ? hdr_find_e.isra.0+0x10c/0x320

[ 560.902208] __asan_load2+0x68/0x90

[ 560.902427] hdr_find_e.isra.0+0x10c/0x320

[ 560.902846] ? cmp_uints+0xe0/0xe0

[ 560.903363] ? cmp_sdh+0x90/0x90

[ 560.903883] ? ntfs_bread_run+0x190/0x190

[ 560.904196] ? rwsem_down_read_slowpath+0x750/0x750

[ 560.904969] ? ntfs_fix_post_read+0xe0/0x130

[ 560.905259] ? __kasan_check_write+0x14/0x20

[ 560.905599] ? up_read+0x1a/0x90

[ 560.905853] ? indx_read+0x22c/0x380

[ 560.906096] indx_find+0x2ef/0x470

[ 560.906352] ? indx_find_buffer+0x2d0/0x2d0

[ 560.906692] ? __kasan_kmalloc+0x88/0xb0

[ 560.906977] dir_search_u+0x196/0x2f0

[ 560.907220] ? ntfs_nls_to_utf16+0x450/0x450

[ 560.907464] ? __kasan_check_write+0x14/0x20

[ 560.907747] ? mutex_lock+0x8f/0xe0

[ 560.907970] ? __mutex_lock_slowpath+0x20/0x20

[ 560.908214] ? kmem_cache_alloc+0x143/0x4b0

[ 560.908459] ntfs_lookup+0xe0/0x100

[ 560.908788] __lookup_slow+0x116/0x220

[ 560.909050] ? lookup_fast+0x1b0/0x1b0

[ 560.909309] ? lookup_fast+0x13f/0x1b0

[ 560.909601] walk_component+0x187/0x230

[ 560.909944] link_path_walk.part.0+0x3f0/0x660

[ 560.910285] ? handle_lookup_down+0x90/0x90

[ 560.910618] ? path_init+0x642/0x6e0

[ 560.911084] ? percpu_counter_add_batch+0x6e/0xf0

[ 560.912559] ? __alloc_file+0x114/0x170

[ 560.913008] path_openat+0x19c/0x1d10

[ 560.913419] ? getname_flags+0x73/0x2b0

[ 560.913815] ? kasan_save_stack+0x3a/0x50

[ 560.914125] ? kasan_save_stack+0x26/0x50

[ 560.914542] ? __kasan_slab_alloc+0x6d/0x90

[ 560.914924] ? kmem_cache_alloc+0x143/0x4b0

[ 560.915339] ? getname_flags+0x73/0x2b0

[ 560.915647] ? getname+0x12/0x20

[ 560.916114] ? __x64_sys_open+0x4c/0x60

[ 560.916460] ? path_lookupat.isra.0+0x230/0x230

[ 560.916867] ? __isolate_free_page+0x2e0/0x2e0

[ 560.917194] do_filp_open+0x15c/0x1f0

[ 560.917448] ? may_open_dev+0x60/0x60

[ 560.917696] ? expand_files+0xa4/0x3a0

[ 560.917923] ? __kasan_check_write+0x14/0x20

[ 560.918185] ? _raw_spin_lock+0x88/0xdb

[ 560.918409] ? _raw_spin_lock_irqsave+0x100/0x100

[ 560.918783] ? _find_next_bit+0x4a/0x130

[ 560.919026] ? _raw_spin_unlock+0x19/0x40

[ 560.919276] ? alloc_fd+0x14b/0x2d0

[ 560.919635] do_sys_openat2+0x32a/0x4b0

[ 560.920035] ? file_open_root+0x230/0x230

[ 560.920336] ? __rcu_read_unlock+0x5b/0x280

[ 560.920813] do_sys_open+0x99/0xf0

[ 560.921208] ? filp_open+0x60/0x60

[ 560.921482] ? exit_to_user_mode_prepare+0x49/0x180

[ 560.921867] __x64_sys_open+0x4c/0x60

[ 560.922128] do_syscall_64+0x3b/0x90

[ 560.922369] entry_SYSCALL_64_after_hwframe+0x63/0xcd

[ 560.923030] RIP: 0033:0x7f7dff2e4469

[ 560.923681] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 088

[ 560.924451] RSP: 002b:00007ffd41a210b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000002

[ 560.925168] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7dff2e4469

[ 560.925655] RDX: 0000000000000000 RSI: 0000000000000002 RDI:

---truncated---

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2022-50442 is recorded against 2 packages.

  • kernel (from 6.1.0 up to 6.1.3)
  • linux-kernel (from 6.1 up to 6.1.3)

Timeline and source

Published on 1 October 2025 and last revised on 17 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2022-50442 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 8.4
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-10-01
Updated 2026-08-20
Modified 2026-08-17

Affected Packages

Software From version Fixed in
kernel 6.1.0 6.1.3
linux-kernel 6.1 6.1.3

Similar Threats

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