CVE-2022-49067

Kernel panic via misclassified vmalloc addresses

Published Feb 26, 2025 · Updated May 11, 2026

Improper address validation in Linux allows local users on affected PowerPC systems to trigger a kernel panic through an ethtool ioctl. virt_addr_valid() treats vmalloc addresses that alias valid page-frame numbers as valid low-memory addresses, causing hardened usercopy to reject a vmalloc-backed copy and abort the kernel. Reachability requires a 32-bit or 64-bit Book3E PowerPC kernel and local ioctl access; the demonstrated consequence is a system crash, not memory disclosure.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper address validation in Linux allows local users on affected PowerPC systems to trigger a kernel panic through an ethtool ioctl. virt_addr_valid() treats vmalloc addresses that alias valid page-frame numbers as valid low-memory addresses, causing hardened usercopy to reject a vmalloc-backed copy and abort the kernel. Reachability requires a 32-bit or 64-bit Book3E PowerPC kernel and local ioctl access; the demonstrated consequence is a system crash, not memory disclosure.

The record

CVE
CVE-2022-49067
Published
Feb 26, 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. Feb 26, 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=4.4
  2. Affected versionversion=ffda09a9941c18d9f08d1176d55588d505f62912 <a3727c25eacd7e437c4f560957fa3a376fe93e6b
  3. Affected versionversion=ffda09a9941c18d9f08d1176d55588d505f62912 <cbc065efcba000ad8f615f506ebe61b6d3c5145b
  4. Affected versionversion=ffda09a9941c18d9f08d1176d55588d505f62912 <d36febbcd537fcc50284e8b89609632d0146529f
  5. Affected versionversion=ffda09a9941c18d9f08d1176d55588d505f62912 <deab81144d5a043f42804207fb76cfbd8a806978
  6. Affected versionversion=ffda09a9941c18d9f08d1176d55588d505f62912 <fddb88bd266f4513abab7c36bca98935c9148a98
  7. Affected versionversion=ffda09a9941c18d9f08d1176d55588d505f62912 <ffa0b64e3be58519ae472ea29a1a1ad681e32f48

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.4; version=ffda09a9941c18d9f08d1176d55588d505f62912 <a3727c25eacd7e437c4f560957fa3a376fe93e6b; version=ffda09a9941c18d9f08d1176d55588d505f62912 <cbc065efcba000ad8f615f506ebe61b6d3c5145b; version=ffda09a9941c18d9f08d1176d55588d505f62912 <d36febbcd537fcc50284e8b89609632d0146529f; version=ffda09a9941c18d9f08d1176d55588d505f62912 <deab81144d5a043f42804207fb76cfbd8a806978; version=ffda09a9941c18d9f08d1176d55588d505f62912 <fddb88bd266f4513abab7c36bca98935c9148a98; version=ffda09a9941c18d9f08d1176d55588d505f62912 <ffa0b64e3be58519ae472ea29a1a1ad681e32f48

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.

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

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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