CVE-2022-49653

Local service interruption via EFCH MMIO memory leak

Published Feb 26, 2025 · Updated May 23, 2026

Memory leakage in the PIIX4 I2C driver's EFCH MMIO path in Linux allows local users to exhaust kernel memory and interrupt service. The cleanup path calls release_resource(), which removes the allocated resource from the resource tree without freeing its memory. The flaw requires local low-privileged access and use of the affected EFCH MMIO path; repeated triggering depletes memory until the host hangs or crashes.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leakage in the PIIX4 I2C driver's EFCH MMIO path in Linux allows local users to exhaust kernel memory and interrupt service. The cleanup path calls release_resource(), which removes the allocated resource from the resource tree without freeing its memory. The flaw requires local low-privileged access and use of the affected EFCH MMIO path; repeated triggering depletes memory until the host hangs or crashes.

The record

CVE
CVE-2022-49653
Published
Feb 26, 2025
Updated
May 23, 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 23, 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=4b965566ca26e83553d92b8c57050e5d59911806 <d2bf1a6480e8d44658a8ac3bdcec081238873212
  2. Affected versionversion=5.15.42 <5.15.54
  3. Affected versionversion=5.17.10 <5.18
  4. Affected versionversion=5.18
  5. Affected versionversion=7c148722d074c29fb998578eea5de3c14b9608c9 <8ad59b397f86a4d8014966fdc0552095a0c4fb2b
  6. Affected versionversion=7c148722d074c29fb998578eea5de3c14b9608c9 <a3263e4cf8265f0c9eb0ed8a9b50f132c7a42e19
  7. Affected versionversion=f48190bca4b1a397f2e050efea2c8e8e72049ec8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4b965566ca26e83553d92b8c57050e5d59911806 <d2bf1a6480e8d44658a8ac3bdcec081238873212; version=5.15.42 <5.15.54; version=5.17.10 <5.18; version=5.18; version=7c148722d074c29fb998578eea5de3c14b9608c9 <8ad59b397f86a4d8014966fdc0552095a0c4fb2b; version=7c148722d074c29fb998578eea5de3c14b9608c9 <a3263e4cf8265f0c9eb0ed8a9b50f132c7a42e19; version=f48190bca4b1a397f2e050efea2c8e8e72049ec8

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.

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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.

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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