CVE-2024-50191

Filesystem-freeze disruption via unlocked read-only transition

Published Nov 8, 2024 · Updated May 11, 2026

Improper locking in the ext4 error path in affected Linux kernel versions allows local users to trigger warnings during filesystem freezing. The ext4_handle_error path changes SB_RDONLY without taking sb->s_umount or following the filesystem remount procedure, so concurrent freeze operations observe an unexpected flag transition. Reachability requires an ext4 filesystem mounted with errors=remount-ro and local low-privileged access; the documented consequence is disruption of filesystem freezing.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the ext4 error path in affected Linux kernel versions allows local users to trigger warnings during filesystem freezing. The ext4_handle_error path changes SB_RDONLY without taking sb->s_umount or following the filesystem remount procedure, so concurrent freeze operations observe an unexpected flag transition. Reachability requires an ext4 filesystem mounted with errors=remount-ro and local low-privileged access; the documented consequence is disruption of filesystem freezing.

The record

CVE
CVE-2024-50191
Published
Nov 8, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.6
  2. Affected versionversion=95257987a6387f02970eda707e55a06cce734e18 <58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9
  3. Affected versionversion=95257987a6387f02970eda707e55a06cce734e18 <d3476f3dad4ad68ae5f6b008ea6591d1520da5d8
  4. Affected versionversion=95257987a6387f02970eda707e55a06cce734e18 <ee77c388469116565e009eaa704a60bc78489e09

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=95257987a6387f02970eda707e55a06cce734e18 <58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9; version=95257987a6387f02970eda707e55a06cce734e18 <d3476f3dad4ad68ae5f6b008ea6591d1520da5d8; version=95257987a6387f02970eda707e55a06cce734e18 <ee77c388469116565e009eaa704a60bc78489e09

Published CVSS scores

5.5CISA-ADPCVSS: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.

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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

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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