CVE-2022-49460

Denial of service via unbalanced DFI enable count

Published Feb 26, 2025 · Updated May 11, 2026

Denial of service in the rk3399 DMC driver in Linux allows local users to disrupt the system by unbinding the DFI device. The rk3399_dmcfreq_remove path releases an enabled devfreq event device without first calling devfreq_event_disable_edev, leaving its enable count unbalanced. Reachability requires local access to an RK3399 system with the driver active and permission to unbind the DFI device.

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

Denial of service in the rk3399 DMC driver in Linux allows local users to disrupt the system by unbinding the DFI device. The rk3399_dmcfreq_remove path releases an enabled devfreq event device without first calling devfreq_event_disable_edev, leaving its enable count unbalanced. Reachability requires local access to an RK3399 system with the driver active and permission to unbind the DFI device.

The record

CVE
CVE-2022-49460
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.9
  2. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <2fccf9e6050e0e3b8b4cd275d41daf7f7fa22804
  3. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <664736e2cc09e504ce58ec61164d029d1f2651bb
  4. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <86b091b6894c449d2734de7aa7d79ccb33ffd97d
  5. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <a0180e324a9a63de8f770da300477b48cb4a53f1
  6. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <a9c2b23a7ac6ab19214cad8cac8af8608a4d9cef
  7. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <cb1be1d4be18fe286ba5a67d928598378fd7fbe5
  8. Affected versionversion=5a893e31a636cca3798af2db5aee8d3d144b1e1e <fb089b6f21de03a685dd31df3789bbb01c59f8e3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <2fccf9e6050e0e3b8b4cd275d41daf7f7fa22804; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <664736e2cc09e504ce58ec61164d029d1f2651bb; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <86b091b6894c449d2734de7aa7d79ccb33ffd97d; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <a0180e324a9a63de8f770da300477b48cb4a53f1; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <a9c2b23a7ac6ab19214cad8cac8af8608a4d9cef; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <cb1be1d4be18fe286ba5a67d928598378fd7fbe5; version=5a893e31a636cca3798af2db5aee8d3d144b1e1e <fb089b6f21de03a685dd31df3789bbb01c59f8e3

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

T1499.004Application 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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