CVE-2024-47700

Kernel crash via unchecked ext4 remount stripe size

Published Oct 21, 2024 · Updated May 11, 2026

Divide-by-zero in affected Linux ext4 kernels allows local users to crash the kernel by remounting a filesystem with an incompatible stripe size. The ext4 remount path retains a stripe value smaller than the cluster ratio, causing EXT4_B2C to return zero for a later divisor. Triggering the fault requires CAP_SYS_ADMIN and a crafted ext4 filesystem; the published record describes a crash, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in affected Linux ext4 kernels allows local users to crash the kernel by remounting a filesystem with an incompatible stripe size. The ext4 remount path retains a stripe value smaller than the cluster ratio, causing EXT4_B2C to return zero for a later divisor. Triggering the fault requires CAP_SYS_ADMIN and a crafted ext4 filesystem; the published record describes a crash, not data access or modification.

The record

CVE
CVE-2024-47700
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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=6.5
  2. Affected versionversion=c3defd99d58cbdd132bd197714e5523dac976b66 <297615e992bbb30a55c158141086be6505d5d722
  3. Affected versionversion=c3defd99d58cbdd132bd197714e5523dac976b66 <a31b712f75445d52fc0451dc54fd7b16a552cb7c
  4. Affected versionversion=c3defd99d58cbdd132bd197714e5523dac976b66 <ee85e0938aa8f9846d21e4d302c3cf6a2a75110d
  5. Affected versionversion=c3defd99d58cbdd132bd197714e5523dac976b66 <faeff8b1ee2eaa5969c8e994d66c3337298cefed

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=c3defd99d58cbdd132bd197714e5523dac976b66 <297615e992bbb30a55c158141086be6505d5d722; version=c3defd99d58cbdd132bd197714e5523dac976b66 <a31b712f75445d52fc0451dc54fd7b16a552cb7c; version=c3defd99d58cbdd132bd197714e5523dac976b66 <ee85e0938aa8f9846d21e4d302c3cf6a2a75110d; version=c3defd99d58cbdd132bd197714e5523dac976b66 <faeff8b1ee2eaa5969c8e994d66c3337298cefed

Published CVSS scores

5.5UbuntuCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Application or System Exploitation

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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