CVE-2022-50815

Service interruption via unchecked ext2 geometry

Published Dec 30, 2025 · Updated Dec 30, 2025

Improper input validation in Linux kernel ext2 2.6.12 through 5.19.16 and 6.0 through 6.0.2 allows local users to interrupt service. The mount path in fs/ext2/super.c accepts a filesystem larger than its block device or a group too small for metadata, then processes attacker-controlled group counts. Reachability requires local access and a crafted filesystem to be mounted; the bounded consequence is loss of system availability, not data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Linux kernel ext2 2.6.12 through 5.19.16 and 6.0 through 6.0.2 allows local users to interrupt service. The mount path in fs/ext2/super.c accepts a filesystem larger than its block device or a group too small for metadata, then processes attacker-controlled group counts. Reachability requires local access and a crafted filesystem to be mounted; the bounded consequence is loss of system availability, not data disclosure or modification.

The record

CVE
CVE-2022-50815
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <321440079763998076b75e0c802524e2218a7d97
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <40ff52527daec00cf1530c17a95636916ddd3b38
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d766f2d1e3e3bd44024a7f971ffcf8b8fbb7c5d2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <321440079763998076b75e0c802524e2218a7d97; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <40ff52527daec00cf1530c17a95636916ddd3b38; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d766f2d1e3e3bd44024a7f971ffcf8b8fbb7c5d2

Published CVSS scores

5.5CVE ProgramCVSS: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

T1499.001OS Exhaustion Flood

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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