CVE-2026-80869

Out-of-bounds read via short NTFS attribute entry

Published Sep 4, 2026 · Updated Sep 4, 2026

Out-of-bounds read in the NTFS driver in Linux 7.1 through 7.1.4 allows attackers to read past a buffer via crafted filesystem metadata. ntfs_read_inode_mount() accepts a short $MFT attribute-list entry after checking only six bytes, then dereferences lowest_vcn and mft_reference beyond al_end. Triggering the read requires mounting crafted NTFS metadata whose attribute-list size is an exact sector-size multiple, eliminating the allocation's usual rounding slack.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the NTFS driver in Linux 7.1 through 7.1.4 allows attackers to read past a buffer via crafted filesystem metadata. ntfs_read_inode_mount() accepts a short $MFT attribute-list entry after checking only six bytes, then dereferences lowest_vcn and mft_reference beyond al_end. Triggering the read requires mounting crafted NTFS metadata whose attribute-list size is an exact sector-size multiple, eliminating the allocation's usual rounding slack.

The record

CVE
CVE-2026-80869
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1203
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <98634df5b1cb56c26299b7409227025ddb0167d8
  2. Affected versionversion=1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <c7a7e48e71ce915ec4cbd6e9f355590c1ecbc29a
  3. Affected versionversion=7.1

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <98634df5b1cb56c26299b7409227025ddb0167d8; version=1e9ea7e04472d4e5e12e58c881eaacfb3e49b669 <c7a7e48e71ce915ec4cbd6e9f355590c1ecbc29a; version=7.1

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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

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Your stack

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