CVE-2026-99102

Process crashes via unsynchronized file resizing

Published Oct 28, 2026 · Updated Oct 28, 2026

A race in Linux NTFS allows local users to trigger process crashes via concurrent file resizing and memory-mapped access. The ntfs_setattr_size() function changes file size and on-disk attributes without holding mapping->invalidate_lock, allowing page faults to encounter a transient runlist. Triggering requires access to the affected NTFS file and overlapping resize and fault operations; the documented failure is a spurious SIGBUS, not a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Nov 1, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

A race in Linux NTFS allows local users to trigger process crashes via concurrent file resizing and memory-mapped access. The ntfs_setattr_size() function changes file size and on-disk attributes without holding mapping->invalidate_lock, allowing page faults to encounter a transient runlist. Triggering requires access to the affected NTFS file and overlapping resize and fault operations; the documented failure is a spurious SIGBUS, not a kernel crash.

The record

CVE
CVE-2026-99102
Published
Oct 28, 2026
Updated
Oct 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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=7.1
  2. Affected versionversion=9c87959601e80b39a45250e362e6ddfec17cb0fa <9cc5761b8f28f9cef72061094eb5e37e2cd44d97
  3. Affected versionversion=9c87959601e80b39a45250e362e6ddfec17cb0fa <f0b0738ba95731eeafd11352c74f8b48951f67dc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=7.1; version=9c87959601e80b39a45250e362e6ddfec17cb0fa <9cc5761b8f28f9cef72061094eb5e37e2cd44d97; version=9c87959601e80b39a45250e362e6ddfec17cb0fa <f0b0738ba95731eeafd11352c74f8b48951f67dc

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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