CVE-2022-49833

Kernel crash via uninitialized zoned device clone

Published May 1, 2025 · Updated Aug 15, 2026

NULL pointer dereference in Linux 5.11 through 6.0.8 allows local users to crash the kernel through a cloned zoned Btrfs device. The Btrfs device-cloning path copies btrfs_device without cloning its btrfs_zoned_device_info, leaving zone_info null when a zone is later marked active. Reachability requires a zoned Btrfs filesystem and a local operation that clones its device state; the bounded consequence is a kernel crash.

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

NULL pointer dereference in Linux 5.11 through 6.0.8 allows local users to crash the kernel through a cloned zoned Btrfs device. The Btrfs device-cloning path copies btrfs_device without cloning its btrfs_zoned_device_info, leaving zone_info null when a zone is later marked active. Reachability requires a zoned Btrfs filesystem and a local operation that clones its device state; the bounded consequence is a kernel crash.

The record

CVE
CVE-2022-49833
Published
May 1, 2025
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.12
  2. Affected versionversion=7365104236ade0bf22edd7724c8fd438b0342ee4 <21e61ec6d0bb786818490e926aa9aeb4de95ad0d
  3. Affected versionversion=7365104236ade0bf22edd7724c8fd438b0342ee4 <ad88cabcec942c033f980cd1e28d56ecdaf5f3b8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=7365104236ade0bf22edd7724c8fd438b0342ee4 <21e61ec6d0bb786818490e926aa9aeb4de95ad0d; version=7365104236ade0bf22edd7724c8fd438b0342ee4 <ad88cabcec942c033f980cd1e28d56ecdaf5f3b8

Published CVSS scores

5.5NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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