CVE-2022-49317

Filesystem hang via unrecorded node-page I/O errors

Published Feb 26, 2025 · Updated Aug 15, 2026

Denial of service in Linux kernel f2fs 3.8 through 5.18.3 allows local users to hang filesystem shutdown via persistent I/O errors. When an f2fs node-page read returns EIO, __get_node_page returns the error without recording the node I/O failure, so dirty-node flushing retries indefinitely. Access to an affected f2fs filesystem and persistent node-page I/O errors are required; the loop hangs checkpoint or unmount processing without reported 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

Denial of service in Linux kernel f2fs 3.8 through 5.18.3 allows local users to hang filesystem shutdown via persistent I/O errors. When an f2fs node-page read returns EIO, __get_node_page returns the error without recording the node I/O failure, so dirty-node flushing retries indefinitely. Access to an affected f2fs filesystem and persistent node-page I/O errors are required; the loop hangs checkpoint or unmount processing without reported data access or modification.

The record

CVE
CVE-2022-49317
Published
Feb 26, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-835, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=127e670abfa7fa150f6550d620ded930f5bdb4e7 <a7b8618aa2f0f926ce85f2486ac835a85c753ca7
  2. Affected versionversion=127e670abfa7fa150f6550d620ded930f5bdb4e7 <bd47ea5d776d8b524fb6f60de3240f95603901dd
  3. Affected versionversion=3.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=127e670abfa7fa150f6550d620ded930f5bdb4e7 <a7b8618aa2f0f926ce85f2486ac835a85c753ca7; version=127e670abfa7fa150f6550d620ded930f5bdb4e7 <bd47ea5d776d8b524fb6f60de3240f95603901dd; version=3.8

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 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-835Loop with Unreachable Exit Condition ('Infinite Loop')
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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