CVE-2022-50147

Kernel memory disclosure via node-mask misindexing

Published Jun 18, 2025 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel mm/mempolicy component allows local users to disclose kernel memory or crash the system. The get_nodes function indexes nmask with maxnode divided by BITS_PER_LONG instead of indexing the last valid word, reading beyond the supplied mask. A local low-privileged user must submit an oversized NUMA node mask through a memory-policy system call; successful exploitation exposes kernel memory or crashes the system.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel mm/mempolicy component allows local users to disclose kernel memory or crash the system. The get_nodes function indexes nmask with maxnode divided by BITS_PER_LONG instead of indexing the last valid word, reading beyond the supplied mask. A local low-privileged user must submit an oversized NUMA node mask through a memory-policy system call; successful exploitation exposes kernel memory or crashes the system.

The record

CVE
CVE-2022-50147
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, 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=5.15
  2. Affected versionversion=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <000eca5d044d1ee23b4ca311793cf3fc528da6c6
  3. Affected versionversion=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <44652154484e7e3d12008802cfb6c28a8aa16d85
  4. Affected versionversion=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <8176f6a0d9c1b06bc7af7c3d6acd4a66448939df
  5. Affected versionversion=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <d1b5113674c3e95bb53c601ce2ea4719e851c74d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <000eca5d044d1ee23b4ca311793cf3fc528da6c6; version=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <44652154484e7e3d12008802cfb6c28a8aa16d85; version=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <8176f6a0d9c1b06bc7af7c3d6acd4a66448939df; version=e130242dc351f1cfa2bbeb6766a1486ce936ef88 <d1b5113674c3e95bb53c601ce2ea4719e851c74d

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 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

CWE-125Out-of-bounds Read
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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