CVE-2022-50737

Use-after-free via malformed NTFS security index roots

Published Dec 24, 2025 · Updated Dec 24, 2025

Use-after-free in the Linux kernel NTFS3 driver allows local users to trigger memory corruption by mounting a crafted NTFS volume. ntfs_security_init reads the $SDH and $SII INDEX_ROOT structures without first ensuring their resident data and used-length fields fit inside the attribute. The volume must be mounted with NTFS3; the public report demonstrates a freed-memory read during mount but does not demonstrate code execution.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux kernel NTFS3 driver allows local users to trigger memory corruption by mounting a crafted NTFS volume. ntfs_security_init reads the $SDH and $SII INDEX_ROOT structures without first ensuring their resident data and used-length fields fit inside the attribute. The volume must be mounted with NTFS3; the public report demonstrates a freed-memory read during mount but does not demonstrate code execution.

The record

CVE
CVE-2022-50737
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24ee53c6bce15500db22f2a7aee9dd830e806c90
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bfcdbae0523bd95eb75a739ffb6221a37109881e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6379ce242960a8e9ecd6ff76f476d9336c21f16
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d7ce7bb6881aae186e50f57eea935cff8d504751

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24ee53c6bce15500db22f2a7aee9dd830e806c90; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bfcdbae0523bd95eb75a739ffb6221a37109881e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6379ce242960a8e9ecd6ff76f476d9336c21f16; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d7ce7bb6881aae186e50f57eea935cff8d504751

Published CVSS scores

7.8Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo