CVE-2022-49210

Local service interruption via incomplete page-table freeing

Published Feb 26, 2025 · Updated May 11, 2026

Memory leak in the Linux kernel allows local users to exhaust system memory by repeatedly creating short-lived processes. On affected 64-bit MIPS configurations, PGD_ORDER is 1, so a page global directory spans two pages while generic pgd_free() releases only one. Repeated process creation therefore leaks a page per teardown and can deplete memory until service is interrupted; the exposed configuration uses 4 KB pages without 48-bit virtual addressing.

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

Memory leak in the Linux kernel allows local users to exhaust system memory by repeatedly creating short-lived processes. On affected 64-bit MIPS configurations, PGD_ORDER is 1, so a page global directory spans two pages while generic pgd_free() releases only one. Repeated process creation therefore leaks a page per teardown and can deplete memory until service is interrupted; the exposed configuration uses 4 KB pages without 48-bit virtual addressing.

The record

CVE
CVE-2022-49210
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=5.9
  2. Affected versionversion=f9cb654cb550b7b87e8608b14fc3eca432429ffe <1bf0d78c8cc3cf615a6e7bf33ada70b73592f0a1
  3. Affected versionversion=f9cb654cb550b7b87e8608b14fc3eca432429ffe <2bc5bab9a763d520937e4f3fe8df51c6a1eceb97
  4. Affected versionversion=f9cb654cb550b7b87e8608b14fc3eca432429ffe <5a8501d34b261906e4c76ec9da679f2cb4d309ed
  5. Affected versionversion=f9cb654cb550b7b87e8608b14fc3eca432429ffe <d29cda15cab086d82d692de016f7249545d4b6b4
  6. Affected versionversion=f9cb654cb550b7b87e8608b14fc3eca432429ffe <fa3d44424579972cc7c4fac3d9cf227798ebdfa0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=f9cb654cb550b7b87e8608b14fc3eca432429ffe <1bf0d78c8cc3cf615a6e7bf33ada70b73592f0a1; version=f9cb654cb550b7b87e8608b14fc3eca432429ffe <2bc5bab9a763d520937e4f3fe8df51c6a1eceb97; version=f9cb654cb550b7b87e8608b14fc3eca432429ffe <5a8501d34b261906e4c76ec9da679f2cb4d309ed; version=f9cb654cb550b7b87e8608b14fc3eca432429ffe <d29cda15cab086d82d692de016f7249545d4b6b4; version=f9cb654cb550b7b87e8608b14fc3eca432429ffe <fa3d44424579972cc7c4fac3d9cf227798ebdfa0

Published CVSS scores

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