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Fencer Vulns
high 7.8

CVE-2022-50507 json

fs/ntfs3: Validate data run offset

published 2025-10-04 13 mo ago modified 2026-08-15 2 mo ago also EUVD-2025-32357

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 5%
public exploits
0
none known

Summary

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

fs/ntfs3: Validate data run offset

This adds sanity checks for data run offset. We should make sure data run offset is legit before trying to unpack them, otherwise we may encounter use-after-free or some unexpected memory access behaviors.

[ 82.940342] BUG: KASAN: use-after-free in run_unpack+0x2e3/0x570 [ 82.941180] Read of size 1 at addr ffff888008a8487f by task mount/240 [ 82.941670] [ 82.942069] CPU: 0 PID: 240 Comm: mount Not tainted 5.19.0+ #15 [ 82.942482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 82.943720] Call Trace: [ 82.944204] <TASK> [ 82.944471] dump_stack_lvl+0x49/0x63 [ 82.944908] print_report.cold+0xf5/0x67b [ 82.945141] ? __wait_on_bit+0x106/0x120 [ 82.945750] ? run_unpack+0x2e3/0x570 [ 82.946626] kasan_report+0xa7/0x120 [ 82.947046] ? run_unpack+0x2e3/0x570 [ 82.947280] __asan_load1+0x51/0x60 [ 82.947483] run_unpack+0x2e3/0x570 [ 82.947709] ? memcpy+0x4e/0x70 [ 82.947927] ? run_pack+0x7a0/0x7a0 [ 82.948158] run_unpack_ex+0xad/0x3f0 [ 82.948399] ? mi_enum_attr+0x14a/0x200 [ 82.948717] ? run_unpack+0x570/0x570 [ 82.949072] ? ni_enum_attr_ex+0x1b2/0x1c0 [ 82.949332] ? ni_fname_type.part.0+0xd0/0xd0 [ 82.949611] ? mi_read+0x262/0x2c0 [ 82.949970] ? ntfs_cmp_names_cpu+0x125/0x180 [ 82.950249] ntfs_iget5+0x632/0x1870 [ 82.950621] ? ntfs_get_block_bmap+0x70/0x70 [ 82.951192] ? evict+0x223/0x280 [ 82.951525] ? iput.part.0+0x286/0x320 [ 82.951969] ntfs_fill_super+0x1321/0x1e20 [ 82.952436] ? put_ntfs+0x1d0/0x1d0 [ 82.952822] ? vsprintf+0x20/0x20 [ 82.953188] ? mutex_unlock+0x81/0xd0 [ 82.953379] ? set_blocksize+0x95/0x150 [ 82.954001] get_tree_bdev+0x232/0x370 [ 82.954438] ? put_ntfs+0x1d0/0x1d0 [ 82.954700] ntfs_fs_get_tree+0x15/0x20 [ 82.955049] vfs_get_tree+0x4c/0x130 [ 82.955292] path_mount+0x645/0xfd0 [ 82.955615] ? putname+0x80/0xa0 [ 82.955955] ? finish_automount+0x2e0/0x2e0 [ 82.956310] ? kmem_cache_free+0x110/0x390 [ 82.956723] ? putname+0x80/0xa0 [ 82.957023] do_mount+0xd6/0xf0 [ 82.957411] ? path_mount+0xfd0/0xfd0 [ 82.957638] ? __kasan_check_write+0x14/0x20 [ 82.957948] __x64_sys_mount+0xca/0x110 [ 82.958310] do_syscall_64+0x3b/0x90 [ 82.958719] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 82.959341] RIP: 0033:0x7fd0d1ce948a [ 82.960193] Code: 48 8b 0d 11 fa 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 008 [ 82.961532] RSP: 002b:00007ffe59ff69a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 82.962527] RAX: ffffffffffffffda RBX: 0000564dcc107060 RCX: 00007fd0d1ce948a [ 82.963266] RDX: 0000564dcc107260 RSI: 0000564dcc1072e0 RDI: 0000564dcc10fce0 [ 82.963686] RBP: 0000000000000000 R08: 0000564dcc107280 R09: 0000000000000020 [ 82.964272] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 0000564dcc10fce0 [ 82.964785] R13: 0000564dcc107260 R14: 0000000000000000 R15: 00000000ffffffff

Patch / fix

  • Linux Linux 5.15.87, 6.0.17, 6.1.3, 6.2
  • linux Debian 14, Debian 13, Debian 12 6.1.4-1

debian advisories DEBIAN-CVE-2022-50507

  • linux Ubuntu 22.04 LTS 5.15.0-69.76
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1033.37
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1031.38
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1030.35
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1027.30
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1030.35
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1035.42
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1017.22

ubuntu advisories UBUNTU-CVE-2022-50507

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-50507 updated

kernel: fs/ntfs3: Validate data run offset

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 5% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.