CVE-2022-49422

Resource exhaustion via leaked character-device regions

Published Feb 26, 2025 · Updated May 11, 2026

Resource leak in the Linux kernel IDXD dmaengine driver allows local users to exhaust resources and interrupt service. When alloc_chrdev_region() fails in idxd_cdev_register(), the function returns without unregistering character-device regions created during earlier loop iterations. NVD assesses the path as requiring local low-privileged access; kernel.org does not document how that user forces or repeats the allocation failure.

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

Resource leak in the Linux kernel IDXD dmaengine driver allows local users to exhaust resources and interrupt service. When alloc_chrdev_region() fails in idxd_cdev_register(), the function returns without unregistering character-device regions created during earlier loop iterations. NVD assesses the path as requiring local low-privileged access; kernel.org does not document how that user forces or repeats the allocation failure.

The record

CVE
CVE-2022-49422
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=42d279f9137ab7d5503836baec2739284b278d8f <5e88561eceb34ae3f88451c2b8e30fe403484189
  2. Affected versionversion=42d279f9137ab7d5503836baec2739284b278d8f <6073af78156b8c3fc1198f8bcc190b7ac3ac0143
  3. Affected versionversion=42d279f9137ab7d5503836baec2739284b278d8f <aab08c1aac01097815fbcf10fce7021d2396a31f
  4. Affected versionversion=42d279f9137ab7d5503836baec2739284b278d8f <b3c7b5d08e9d5b2ff31c03078c00ecf11042419f
  5. Affected versionversion=42d279f9137ab7d5503836baec2739284b278d8f <c308a2e711a52a47f4b45e7add2b5200169e429a
  6. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=42d279f9137ab7d5503836baec2739284b278d8f <5e88561eceb34ae3f88451c2b8e30fe403484189; version=42d279f9137ab7d5503836baec2739284b278d8f <6073af78156b8c3fc1198f8bcc190b7ac3ac0143; version=42d279f9137ab7d5503836baec2739284b278d8f <aab08c1aac01097815fbcf10fce7021d2396a31f; version=42d279f9137ab7d5503836baec2739284b278d8f <b3c7b5d08e9d5b2ff31c03078c00ecf11042419f; version=42d279f9137ab7d5503836baec2739284b278d8f <c308a2e711a52a47f4b45e7add2b5200169e429a; version=5.6

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

T1499.004Endpoint Denial of Service: Application 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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