CVE-2026-90418Hinoki check available

Kernel crash via dirty-page state race

Published Sep 17, 2026 · Updated Sep 17, 2026

A dirty-page race in Linux NILFS2 allows local users to trigger a kernel BUG via filesystem operations on corrupted metadata. In fs/nilfs2/page.c, nilfs_copy_dirty_pages() treats a cleared dirty flag as a fatal invariant violation while copying DAT metadata into its shadow cache, although read-only transition handling clears that flag asynchronously. The path requires a mounted NILFS2 filesystem with metadata corruption; the resulting kernel oops interrupts operation, without evidence of code execution.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A dirty-page race in Linux NILFS2 allows local users to trigger a kernel BUG via filesystem operations on corrupted metadata. In fs/nilfs2/page.c, nilfs_copy_dirty_pages() treats a cleared dirty flag as a fatal invariant violation while copying DAT metadata into its shadow cache, although read-only transition handling clears that flag asynchronously. The path requires a mounted NILFS2 filesystem with metadata corruption; the resulting kernel oops interrupts operation, without evidence of code execution.

The record

CVE
CVE-2026-90418
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=3.10
  2. Affected versionversion=8c26c4e2694a163d525976e804d81cd955bbb40c <3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05
  3. Affected versionversion=8c26c4e2694a163d525976e804d81cd955bbb40c <4e1f21e7540b25d83f86b50780836ed7d2afcc93
  4. Affected versionversion=8c26c4e2694a163d525976e804d81cd955bbb40c <5166a21b12f549774f2983fa86d2526ea9e66ace
  5. Affected versionversion=8c26c4e2694a163d525976e804d81cd955bbb40c <66f4ad3ce158902e5f98afea93189972ed8750c2
  6. Affected versionversion=8c26c4e2694a163d525976e804d81cd955bbb40c <f181155baf0c93a74ebe804c6cecbe970e78ee9e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=8c26c4e2694a163d525976e804d81cd955bbb40c <3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05; version=8c26c4e2694a163d525976e804d81cd955bbb40c <4e1f21e7540b25d83f86b50780836ed7d2afcc93; version=8c26c4e2694a163d525976e804d81cd955bbb40c <5166a21b12f549774f2983fa86d2526ea9e66ace; version=8c26c4e2694a163d525976e804d81cd955bbb40c <66f4ad3ce158902e5f98afea93189972ed8750c2; version=8c26c4e2694a163d525976e804d81cd955bbb40c <f181155baf0c93a74ebe804c6cecbe970e78ee9e

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS: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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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