CVE-2022-49880

Local denial of service via inline-data migration

Published May 1, 2025 · Updated May 11, 2026

Improper state handling in Linux ext4 allows local users to trigger a kernel warning and interrupt service through crafted filesystem operations. The ext4 migration ioctl accepts an inode that still has inline data, leaving extent state inconsistent so ENOSPC writeback releases a delayed block when no data block is reserved. The path requires local access to migrate the inline-data inode and force ENOSPC; the warning terminates the kernel only where panic policy treats warnings as fatal.

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 state handling in Linux ext4 allows local users to trigger a kernel warning and interrupt service through crafted filesystem operations. The ext4 migration ioctl accepts an inode that still has inline data, leaving extent state inconsistent so ENOSPC writeback releases a delayed block when no data block is reserved. The path requires local access to migrate the inline-data inode and force ENOSPC; the warning terminates the kernel only where panic policy treats warnings as fatal.

The record

CVE
CVE-2022-49880
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE 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=3.8
  2. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <0a43c015e98121c91a76154edf42280ce1a8a883
  3. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <0de5ee103747fd3a24f1c010c79caabe35e8f0bb
  4. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <1b8f787ef547230a3249bcf897221ef0cc78481b
  5. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <5370b965b7a945bb8f48b9ee23d83a76a947902e
  6. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <72743d5598b9096950bbfd6a9b7f173d156eea97
  7. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <890d738f569fa9412b70ba09f15407f17a52da20
  8. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <89bee03d2fb8c54119b38ac6c24e7d60fae036b6
  9. Affected versionversion=67cf5b09a46f72e048501b84996f2f77bc42e947 <c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <0a43c015e98121c91a76154edf42280ce1a8a883; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <0de5ee103747fd3a24f1c010c79caabe35e8f0bb; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <1b8f787ef547230a3249bcf897221ef0cc78481b; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <5370b965b7a945bb8f48b9ee23d83a76a947902e; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <72743d5598b9096950bbfd6a9b7f173d156eea97; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <890d738f569fa9412b70ba09f15407f17a52da20; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <89bee03d2fb8c54119b38ac6c24e7d60fae036b6; version=67cf5b09a46f72e048501b84996f2f77bc42e947 <c3bf1e95cfa7d950dc3c064d0c2e3d06b427bc63

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.

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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