CVE-2022-50313Public exploit

Local service interruption via negative EROFS inode

Published Sep 15, 2025 · Updated Sep 15, 2025

Improper inode-size validation in Linux EROFS allows local users to trigger a kernel warning through a crafted filesystem image. The EROFS inode reader compares signed i_size with EROFS_BLKSIZ without first rejecting negative values, misclassifies the inode as a fast symlink, and passes the invalid size into allocation handling. The crafted image must be processed locally; the warning can crash systems configured to panic on kernel warnings, while other systems log the fault.

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

What happened

Improper inode-size validation in Linux EROFS allows local users to trigger a kernel warning through a crafted filesystem image. The EROFS inode reader compares signed i_size with EROFS_BLKSIZ without first rejecting negative values, misclassifies the inode as a fast symlink, and passes the invalid size into allocation handling. The crafted image must be processed locally; the warning can crash systems configured to panic on kernel warnings, while other systems log the fault.

The record

CVE
CVE-2022-50313
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=4.19
  2. Affected versionversion=431339ba90423a038914c6032bfd71f0ba7ef2f2 <0ab621fcdff1a58ff4de51a8590fa92a0ecd34be
  3. Affected versionversion=431339ba90423a038914c6032bfd71f0ba7ef2f2 <17a0cdbd7b0cf0fc0d7ca4187a67f8f1c18c291f
  4. Affected versionversion=431339ba90423a038914c6032bfd71f0ba7ef2f2 <1dd73601a1cba37a0ed5f89a8662c90191df5873
  5. Affected versionversion=431339ba90423a038914c6032bfd71f0ba7ef2f2 <6235fb899b25fd287d5e42635ff82196395708cc
  6. Affected versionversion=431339ba90423a038914c6032bfd71f0ba7ef2f2 <acc2f40b980c61a9178b72cdedd150b829064997
  7. Affected versionversion=431339ba90423a038914c6032bfd71f0ba7ef2f2 <b6c8330f5b0f22149957a2e4977fd0f01a9db7cd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=431339ba90423a038914c6032bfd71f0ba7ef2f2 <0ab621fcdff1a58ff4de51a8590fa92a0ecd34be; version=431339ba90423a038914c6032bfd71f0ba7ef2f2 <17a0cdbd7b0cf0fc0d7ca4187a67f8f1c18c291f; version=431339ba90423a038914c6032bfd71f0ba7ef2f2 <1dd73601a1cba37a0ed5f89a8662c90191df5873; version=431339ba90423a038914c6032bfd71f0ba7ef2f2 <6235fb899b25fd287d5e42635ff82196395708cc; version=431339ba90423a038914c6032bfd71f0ba7ef2f2 <acc2f40b980c61a9178b72cdedd150b829064997; version=431339ba90423a038914c6032bfd71f0ba7ef2f2 <b6c8330f5b0f22149957a2e4977fd0f01a9db7cd

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 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 exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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