CVE-2022-49428

Kernel panic via unchecked F2FS inline_dots flag

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel F2FS driver allows local users to crash the kernel through a crafted filesystem image. For a special-file inode, F2FS leaves mapping->a_ops unset but accepts inline_dots; lookup recovery then calls a_ops->set_dirty_page through the NULL pointer. Exploitation requires local access and a crafted F2FS image to be mounted and traversed; the bounded consequence is a system-wide kernel panic.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel F2FS driver allows local users to crash the kernel through a crafted filesystem image. For a special-file inode, F2FS leaves mapping->a_ops unset but accepts inline_dots; lookup recovery then calls a_ops->set_dirty_page through the NULL pointer. Exploitation requires local access and a crafted F2FS image to be mounted and traversed; the bounded consequence is a system-wide kernel panic.

The record

CVE
CVE-2022-49428
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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=4.1
  2. Affected versionversion=510022a85839a8409d1e6a519bb86ce71a84f30a <12662d19467b391b5b509ac5e9ab4f583c6dde16
  3. Affected versionversion=510022a85839a8409d1e6a519bb86ce71a84f30a <250e5a6be52a6b9d82fe91976c83cc158868b4e9
  4. Affected versionversion=510022a85839a8409d1e6a519bb86ce71a84f30a <2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a
  5. Affected versionversion=510022a85839a8409d1e6a519bb86ce71a84f30a <34f48ce5d5936eea33e3b6415403e57eb84aff97

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.1; version=510022a85839a8409d1e6a519bb86ce71a84f30a <12662d19467b391b5b509ac5e9ab4f583c6dde16; version=510022a85839a8409d1e6a519bb86ce71a84f30a <250e5a6be52a6b9d82fe91976c83cc158868b4e9; version=510022a85839a8409d1e6a519bb86ce71a84f30a <2f46160d0a19b13bfe96c0dd50eed5c5d253ab7a; version=510022a85839a8409d1e6a519bb86ce71a84f30a <34f48ce5d5936eea33e3b6415403e57eb84aff97

Published CVSS scores

5.5NIST NVDCVSS: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-476NULL Pointer Dereference
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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