CVE-2022-49553

Kernel crash via invalid NTFS cluster shift

Published Feb 26, 2025 · Updated Aug 5, 2026

Shift-out-of-bounds in the Linux ntfs3 boot-sector parser allows attackers to crash the kernel via a crafted NTFS volume. ntfs_init_from_boot passes an unchecked sectors_per_clusters value to true_sectors_per_clst, which uses it as a shift exponent and derives invalid cluster geometry. Execution requires a victim or automount service to mount the attacker-supplied volume; the resulting geometry can also expose or corrupt kernel and on-disk data.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Shift-out-of-bounds in the Linux ntfs3 boot-sector parser allows attackers to crash the kernel via a crafted NTFS volume. ntfs_init_from_boot passes an unchecked sectors_per_clusters value to true_sectors_per_clst, which uses it as a shift exponent and derives invalid cluster geometry. Execution requires a victim or automount service to mount the attacker-supplied volume; the resulting geometry can also expose or corrupt kernel and on-disk data.

The record

CVE
CVE-2022-49553
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15
  2. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <4746c49b11b2403f5b5b07c6eac9e60663dcd9a3
  3. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <58cf68a1886d14ffdc5c892ce483a82156769e88
  4. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <a2b6986316a2d106f6951e76db70fa4b2fde64a9
  5. Affected versionversion=82cae269cfa953032fbb8980a7d554d60fb00b17 <a3b774342fa752a5290c0de36375289dfcf4a260

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <4746c49b11b2403f5b5b07c6eac9e60663dcd9a3; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <58cf68a1886d14ffdc5c892ce483a82156769e88; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <a2b6986316a2d106f6951e76db70fa4b2fde64a9; version=82cae269cfa953032fbb8980a7d554d60fb00b17 <a3b774342fa752a5290c0de36375289dfcf4a260

Published CVSS scores

7.8Linux kernel security teamCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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