CVE-2022-49442

Service interruption via leaked compaction sysfs files

Published Feb 26, 2025 · Updated May 11, 2026

A memory leak in the Linux kernel allows local users to exhaust kernel resources when registered NUMA nodes are repeatedly removed. drivers/base/node.c creates each node's compact sysfs file in compaction_register_node, but unregister_node omits compaction_unregister_node when that node is removed. Reachability requires local low-privileged access and node unregistration; repeated leaks can consume kernel memory and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in the Linux kernel allows local users to exhaust kernel resources when registered NUMA nodes are repeatedly removed. drivers/base/node.c creates each node's compact sysfs file in compaction_register_node, but unregister_node omits compaction_unregister_node when that node is removed. Reachability requires local low-privileged access and node unregistration; repeated leaks can consume kernel memory and interrupt service.

The record

CVE
CVE-2022-49442
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, 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=2.6.35
  2. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <386e69e068177ee91cac27f2f0e6ebda1515f5ca
  3. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <39642b0feddb9c39faa6de469a94bfeb4dc0d3a9
  4. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <466134df7561aeb801baddf6666b512e0e1a1707
  5. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <606732650a2c88e66c59c22dd5464ea0d820250e
  6. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <6905be93d1ab54f73718047536fec0ca488d5315
  7. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <b3fcf1f583b1a0946d9d9bfb7362c9c186801775
  8. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <d8a5bdc767f17281da648555cdbd286f98fd98ee
  9. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <da63dc84befaa9e6079a0bc363ff0eaa975f9073
  10. Affected versionversion=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <f76ddc8fcf6d81fe89bfa4d3efcbc4fe69a91d48

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.35; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <386e69e068177ee91cac27f2f0e6ebda1515f5ca; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <39642b0feddb9c39faa6de469a94bfeb4dc0d3a9; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <466134df7561aeb801baddf6666b512e0e1a1707; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <606732650a2c88e66c59c22dd5464ea0d820250e; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <6905be93d1ab54f73718047536fec0ca488d5315; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <b3fcf1f583b1a0946d9d9bfb7362c9c186801775; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <d8a5bdc767f17281da648555cdbd286f98fd98ee; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <da63dc84befaa9e6079a0bc363ff0eaa975f9073; version=ed4a6d7f0676db50b5023cc01f6cda82a2f2a307 <f76ddc8fcf6d81fe89bfa4d3efcbc4fe69a91d48

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application 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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