CVE-2022-50286

Kernel panic via nonexistent extent-tree search

Published Sep 15, 2025 · Updated Sep 15, 2025

Improper extent handling in Linux ext4 allows local users to crash the kernel by writing to a bigalloc and inline-data file system. ext4_clu_mapped calls ext4_find_extent for an inline file with no valid extent tree, caching garbage in the extent-status and pending-reservation trees. The path requires local write access and both file-system features; triggering it can corrupt reservation accounting, leak kernel memory, and panic the host.

CVSS severity7.8
High
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 extent handling in Linux ext4 allows local users to crash the kernel by writing to a bigalloc and inline-data file system. ext4_clu_mapped calls ext4_find_extent for an inline file with no valid extent tree, caching garbage in the extent-status and pending-reservation trees. The path requires local write access and both file-system features; triggering it can corrupt reservation accounting, leak kernel memory, and panic the host.

The record

CVE
CVE-2022-50286
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <131294c35ed6f777bd4e79d42af13b5c41bf2775
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6f4200ec76a0d31200c308ec5a71c68df5417004
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <81b915181c630ee1cffa052e52874fe4e1ba91ac
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9404839e0c9db5a517ea83c0ca3388b39d105fdf
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c0c8edbc8abbe8f16d80a1d794d1ba2c12b6f193
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d440d6427a5e3a877c1c259b8d2b216ddb65e185

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <131294c35ed6f777bd4e79d42af13b5c41bf2775; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6f4200ec76a0d31200c308ec5a71c68df5417004; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <81b915181c630ee1cffa052e52874fe4e1ba91ac; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9404839e0c9db5a517ea83c0ca3388b39d105fdf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c0c8edbc8abbe8f16d80a1d794d1ba2c12b6f193; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d440d6427a5e3a877c1c259b8d2b216ddb65e185

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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

T1499.004Endpoint Denial of Service: Application 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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