CVE-2022-49318

Local denial of service via F2FS WARN_ON

Published Feb 26, 2025 · Updated Aug 15, 2026

Denial of service in the Linux kernel F2FS driver allows local users to trigger kernel warnings through malformed F2FS metadata. The f2fs_is_valid_blkaddr and __is_bitmap_valid checks invoke WARN_ON when block addresses or bitmap data fail range validation. Reachability requires local access to present or use the malformed filesystem state; systems configured to panic on warnings can crash.

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

Denial of service in the Linux kernel F2FS driver allows local users to trigger kernel warnings through malformed F2FS metadata. The f2fs_is_valid_blkaddr and __is_bitmap_valid checks invoke WARN_ON when block addresses or bitmap data fail range validation. Reachability requires local access to present or use the malformed filesystem state; systems configured to panic on warnings can crash.

The record

CVE
CVE-2022-49318
Published
Feb 26, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
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=4.14.86 <4.15
  2. Affected versionversion=4.19
  3. Affected versionversion=4.4.172 <4.5
  4. Affected versionversion=4.9.144 <4.10
  5. Affected versionversion=aafb371575161e315a98dee978b72f9d5357791b
  6. Affected versionversion=ad19d1e78fd51f5b4bf3ebbcbf3a133c8c03c49d
  7. Affected versionversion=bdffda8db8d9e0125b9a41edc420c39f9905c6ab
  8. Affected versionversion=c9b60788fc760d136211853f10ce73dc152d1f4a <0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd
  9. Affected versionversion=c9b60788fc760d136211853f10ce73dc152d1f4a <32bea51fe4c6e92c00403739f7547c89219bea88
  10. Affected versionversion=c9b60788fc760d136211853f10ce73dc152d1f4a <8c62c5e26345c34d199b4b8c8e69255ba3d0e751
  11. Affected versionversion=c9b60788fc760d136211853f10ce73dc152d1f4a <99c09b298e47ebbe345a6da9f268b32a6b0f4582
  12. Affected versionversion=c9b60788fc760d136211853f10ce73dc152d1f4a <cd6374af36cc548464d8c47a93fdba7303bb82a4
  13. Affected versionversion=c9b60788fc760d136211853f10ce73dc152d1f4a <dc2f78e2d4cc844a1458653d57ce1b54d4a29f21

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14.86 <4.15; version=4.19; version=4.4.172 <4.5; version=4.9.144 <4.10; version=aafb371575161e315a98dee978b72f9d5357791b; version=ad19d1e78fd51f5b4bf3ebbcbf3a133c8c03c49d; version=bdffda8db8d9e0125b9a41edc420c39f9905c6ab; version=c9b60788fc760d136211853f10ce73dc152d1f4a <0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd; version=c9b60788fc760d136211853f10ce73dc152d1f4a <32bea51fe4c6e92c00403739f7547c89219bea88; version=c9b60788fc760d136211853f10ce73dc152d1f4a <8c62c5e26345c34d199b4b8c8e69255ba3d0e751; version=c9b60788fc760d136211853f10ce73dc152d1f4a <99c09b298e47ebbe345a6da9f268b32a6b0f4582; version=c9b60788fc760d136211853f10ce73dc152d1f4a <cd6374af36cc548464d8c47a93fdba7303bb82a4; version=c9b60788fc760d136211853f10ce73dc152d1f4a <dc2f78e2d4cc844a1458653d57ce1b54d4a29f21

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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

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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