CVE-2022-50782

Kernel crash via unchecked bad quota inode

Published Dec 24, 2025 · Updated Dec 24, 2025

Denial of service in Linux kernel ext4 allows local users to crash the kernel by mounting a crafted quota-enabled filesystem. Ext4 accepts inode 5 as a quota inode after ext4_iget marks it bad, bypassing extent validation and feeding disordered extents to __es_tree_search, whose BUG_ON fires. Reaching the path requires privilege to mount the crafted ext4 image with quotas enabled; the demonstrated consequence is a kernel BUG and service interruption.

CVSS severityUnavailable
Unscored
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 kernel ext4 allows local users to crash the kernel by mounting a crafted quota-enabled filesystem. Ext4 accepts inode 5 as a quota inode after ext4_iget marks it bad, bypassing extent validation and feeding disordered extents to __es_tree_search, whose BUG_ON fires. Reaching the path requires privilege to mount the crafted ext4 image with quotas enabled; the demonstrated consequence is a kernel BUG and service interruption.

The record

CVE
CVE-2022-50782
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0dcbf4dc3d54aab5990952cfd832042fb300dbe3
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1d5524832ff204b8a8cd54ae1628b2122f6e9a8d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1daff79463d7d76096c84c57cddc30c5d4be2226
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <794c9175db1f2e5d2a28c326f10bd024dbd944f8
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98004f926d27eaccdd2d336b7916a42e07392da1
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d323877484765aaacbb2769b06e355c2041ed115
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb1d3b4107b4837b4a0dbbf01954269bd6acfdc3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0dcbf4dc3d54aab5990952cfd832042fb300dbe3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1d5524832ff204b8a8cd54ae1628b2122f6e9a8d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1daff79463d7d76096c84c57cddc30c5d4be2226; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <794c9175db1f2e5d2a28c326f10bd024dbd944f8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98004f926d27eaccdd2d336b7916a42e07392da1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d323877484765aaacbb2769b06e355c2041ed115; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb1d3b4107b4837b4a0dbbf01954269bd6acfdc3

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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