CVE-2022-49763

Kernel-memory corruption via unchecked NTFS attribute offset

Published May 1, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel NTFS driver allows local users to corrupt kernel memory by presenting a crafted NTFS volume. ntfs_read_inode_mount accepts an attrs_offset larger than bytes_allocated, so ntfs_attr_find dereferences an attribute record outside its allocated bounds. The malformed volume must be mounted or automounted; the resulting out-of-bounds use-after-free access can disclose or corrupt kernel memory or crash the host.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel NTFS driver allows local users to corrupt kernel memory by presenting a crafted NTFS volume. ntfs_read_inode_mount accepts an attrs_offset larger than bytes_allocated, so ntfs_attr_find dereferences an attribute record outside its allocated bounds. The malformed volume must be mounted or automounted; the resulting out-of-bounds use-after-free access can disclose or corrupt kernel memory or crash the host.

The record

CVE
CVE-2022-49763
Published
May 1, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 1, 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?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <266bd5306286316758e6246ea0345133427b0f62
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4863f815463034f588a035cfd99cdca97a4f1069
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5330c423b86263ac7883fef0260b9e2229cb531e
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <79f3ac7dcd12c05b7539239a4c6fa229a50d786c
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b825bfbbaafbe8da2037e3a778ad660c59f9e054
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d0006d739738a658a9c29b438444259d9f71dfa0
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d85a1bec8e8d552ab13163ca1874dcd82f3d1550
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb2004bafd1932e08d21ca604ee5844f2b7f212d
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <266bd5306286316758e6246ea0345133427b0f62; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4863f815463034f588a035cfd99cdca97a4f1069; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5330c423b86263ac7883fef0260b9e2229cb531e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <79f3ac7dcd12c05b7539239a4c6fa229a50d786c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b825bfbbaafbe8da2037e3a778ad660c59f9e054; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d0006d739738a658a9c29b438444259d9f71dfa0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d85a1bec8e8d552ab13163ca1874dcd82f3d1550; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb2004bafd1932e08d21ca604ee5844f2b7f212d; version=2.6.12

Published CVSS scores

7.8Linux Kernel SecurityCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-416Use After Free
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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