CVE-2026-93258Hinoki check available

Kernel crash via inode type confusion

Published Sep 24, 2026 · Updated Sep 24, 2026

Linux kernel 6.19 contains an inode validation flaw that allows local users to crash the system via crafted OCFS2 filesystem metadata. In ocfs2_read_inode_block_full(), make_bad_inode() resets a directory inode's type to S_IFREG during active VFS lookup, confusing VFS validation and triggering a kernel BUG. Exploitation requires local ability to present corrupted OCFS2 inode data; the published record supports denial of service through a kernel crash, not code execution or data disclosure.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Linux kernel 6.19 contains an inode validation flaw that allows local users to crash the system via crafted OCFS2 filesystem metadata. In ocfs2_read_inode_block_full(), make_bad_inode() resets a directory inode's type to S_IFREG during active VFS lookup, confusing VFS validation and triggering a kernel BUG. Exploitation requires local ability to present corrupted OCFS2 inode data; the published record supports denial of service through a kernel crash, not code execution or data disclosure.

The record

CVE
CVE-2026-93258
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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?

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  1. Affected versionversion=58b6fcd2ab34399258dc509f701d0986a8e0bcaa <0e7459abff46e28e64367057038ef8607e63f599
  2. Affected versionversion=58b6fcd2ab34399258dc509f701d0986a8e0bcaa <d48ace65322001b41bb5322442a21425ef4407d4
  3. Affected versionversion=6.19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=58b6fcd2ab34399258dc509f701d0986a8e0bcaa <0e7459abff46e28e64367057038ef8607e63f599; version=58b6fcd2ab34399258dc509f701d0986a8e0bcaa <d48ace65322001b41bb5322442a21425ef4407d4; version=6.19

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
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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