CVE-2022-50013

Kernel crash via inconsistent F2FS NAT state

Published Jun 18, 2025 · Updated Aug 15, 2026

Denial of service in Linux 3.8 through 5.19.3 allows local users to crash the kernel through an F2FS extended-attribute write. In f2fs_new_node_page(), a free NAT bitmap slot paired with a non-NULL NAT block address invokes f2fs_bug_on() instead of returning a filesystem-corruption error. A local low-privileged user must be able to set an extended attribute on a mounted F2FS volume; the documented impact is a kernel crash.

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 3.8 through 5.19.3 allows local users to crash the kernel through an F2FS extended-attribute write. In f2fs_new_node_page(), a free NAT bitmap slot paired with a non-NULL NAT block address invokes f2fs_bug_on() instead of returning a filesystem-corruption error. A local low-privileged user must be able to set an extended attribute on a mounted F2FS volume; the documented impact is a kernel crash.

The record

CVE
CVE-2022-50013
Published
Jun 18, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=22ad0b6ab46683975c6da032f1c2593066c7b3bd <141170b759e03958f296033bb7001be62d1d363b
  2. Affected versionversion=22ad0b6ab46683975c6da032f1c2593066c7b3bd <29e734ec33ae4bd7de4018fb0fb0eec808c36b92
  3. Affected versionversion=22ad0b6ab46683975c6da032f1c2593066c7b3bd <43ce0a0bda2c54dad91d5a1943554eed9e050f55
  4. Affected versionversion=22ad0b6ab46683975c6da032f1c2593066c7b3bd <5a01e45b925a0bc9718eccd33e5920f1a4e44caf
  5. Affected versionversion=22ad0b6ab46683975c6da032f1c2593066c7b3bd <800ba8979111184d5194f4233cc83afe683efc54
  6. Affected versionversion=22ad0b6ab46683975c6da032f1c2593066c7b3bd <fbfad62b29e9f8f1c1026a806c9e064ec2a7c342
  7. Affected versionversion=4.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=22ad0b6ab46683975c6da032f1c2593066c7b3bd <141170b759e03958f296033bb7001be62d1d363b; version=22ad0b6ab46683975c6da032f1c2593066c7b3bd <29e734ec33ae4bd7de4018fb0fb0eec808c36b92; version=22ad0b6ab46683975c6da032f1c2593066c7b3bd <43ce0a0bda2c54dad91d5a1943554eed9e050f55; version=22ad0b6ab46683975c6da032f1c2593066c7b3bd <5a01e45b925a0bc9718eccd33e5920f1a4e44caf; version=22ad0b6ab46683975c6da032f1c2593066c7b3bd <800ba8979111184d5194f4233cc83afe683efc54; version=22ad0b6ab46683975c6da032f1c2593066c7b3bd <fbfad62b29e9f8f1c1026a806c9e064ec2a7c342; version=4.11

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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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