CVE-2022-50205

Kernel crash via unchecked ext2 inode counts

Published Jun 18, 2025 · Updated May 11, 2026

Improper ext2 superblock validation in affected Linux kernels allows local users to crash the host via a corrupted filesystem. ext2_fill_super accepts fewer than one block of inodes per group and does not verify the total against the product of group count and inodes per group. Reachability requires the kernel to process attacker-controlled ext2 metadata; triggering interrupts the host without reported 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 ext2 superblock validation in affected Linux kernels allows local users to crash the host via a corrupted filesystem. ext2_fill_super accepts fewer than one block of inodes per group and does not verify the total against the product of group count and inodes per group. Reachability requires the kernel to process attacker-controlled ext2 metadata; triggering interrupts the host without reported data disclosure or modification.

The record

CVE
CVE-2022-50205
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07303a9abe3a997d9864fb4315e34b5acfe8fc25
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0bcdc31094a12b4baf59e241feabc9787cf635fa
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5e63c5fe9123fa76ffaeff26c211308736ec3a07
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a48fdc88a3c35e046a6a0a38eba00f21c65b16e
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <96b18d3a1be0354ccce43f0ef61b5a3d7e432552
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b3f423683818cfe15de14d5d9dff44148ff16bbf
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d08bb199a406424a8ed0009efdf41710e6d849ee
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fa78f336937240d1bc598db817d638086060e7e9
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07303a9abe3a997d9864fb4315e34b5acfe8fc25; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0bcdc31094a12b4baf59e241feabc9787cf635fa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5e63c5fe9123fa76ffaeff26c211308736ec3a07; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7a48fdc88a3c35e046a6a0a38eba00f21c65b16e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <96b18d3a1be0354ccce43f0ef61b5a3d7e432552; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b3f423683818cfe15de14d5d9dff44148ff16bbf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d08bb199a406424a8ed0009efdf41710e6d849ee; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fa78f336937240d1bc598db817d638086060e7e9; version=2.6.12

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 exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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