CVE-2026-53027

Service interruption via unloaded NTFS3 run

Published Jun 24, 2026 · Updated Jun 24, 2026

Improper run-list handling in Linux Kernel NTFS3 allows local users to interrupt service through a compressed or sparse file attribute. In attr_data_get_block_locked(), frame alignment can place vcn0 in a different attribute segment, but the function loads runs only for the segment containing vcn, causing run_lookup_entry() to treat the unloaded vcn0 run as sparse and reach WARN_ON(1). Triggering the fault requires local access to an affected NTFS3 filesystem and a frame-aligned compressed or sparse attribute; the published impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper run-list handling in Linux Kernel NTFS3 allows local users to interrupt service through a compressed or sparse file attribute. In attr_data_get_block_locked(), frame alignment can place vcn0 in a different attribute segment, but the function loads runs only for the segment containing vcn, causing run_lookup_entry() to treat the unloaded vcn0 run as sparse and reach WARN_ON(1). Triggering the fault requires local access to an affected NTFS3 filesystem and a frame-aligned compressed or sparse attribute; the published impact is limited to availability.

The record

CVE
CVE-2026-53027
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=406a037d93b769bca248476bd14bbe548dc1ec35
  2. Affected versionversion=6.1.132 <6.2
  3. Affected versionversion=6.2
  4. Affected versionversion=c380b52f6c5702cc4bdda5e6d456d6c19a201a0b <2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54
  5. Affected versionversion=c380b52f6c5702cc4bdda5e6d456d6c19a201a0b <d7ea8495fd307b58f8867acd81a1b40075b1d3ba

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=406a037d93b769bca248476bd14bbe548dc1ec35; version=6.1.132 <6.2; version=6.2; version=c380b52f6c5702cc4bdda5e6d456d6c19a201a0b <2b4ae1ce613ade8a7e118fba4a5a77cd23e97e54; version=c380b52f6c5702cc4bdda5e6d456d6c19a201a0b <d7ea8495fd307b58f8867acd81a1b40075b1d3ba

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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