CVE-2022-50191

Service interruption via regulator node reference leak

Published Jun 18, 2025 · Updated May 11, 2026

Reference-count leakage in the Linux kernel allows local users to interrupt service through repeated regulator constraint parsing. In drivers/regulator/of_regulator.c, of_get_regulation_constraints() obtains a child node with of_get_child_by_name() but skips of_node_put() when no suspend-state object exists, retaining the incremented reference. Reachability requires local low-privilege access and a device-tree regulator path that reaches the missing-release branch; the bounded consequence is availability loss.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reference-count leakage in the Linux kernel allows local users to interrupt service through repeated regulator constraint parsing. In drivers/regulator/of_regulator.c, of_get_regulation_constraints() obtains a child node with of_get_child_by_name() but skips of_node_put() when no suspend-state object exists, retaining the incremented reference. Reachability requires local low-privilege access and a device-tree regulator path that reaches the missing-release branch; the bounded consequence is availability loss.

The record

CVE
CVE-2022-50191
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=3.19
  2. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <11ecb4f8735b0230d54a82c18b21ea778b695d61
  3. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <332e555dca074c4eb2084898021c3676423814c3
  4. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <35f9e861d9b9434903a8ede37a3561f78985826d
  5. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <66efb665cd5ad69b27dca8571bf89fc6b9c628a4
  6. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <a23098cc32860272dc6c3200ff20c34c65b7b694
  7. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <b9ca8585c766616563cf3c062c6878f61f83cf00
  8. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <c9df8ff290097aabd5c9200f7f729b0813d37b19
  9. Affected versionversion=40e20d68bb3fb1ce2704c886d597918988d3321d <fc7b19f547bc9e622060a0a9a39da2330aa21c53

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.19; version=40e20d68bb3fb1ce2704c886d597918988d3321d <11ecb4f8735b0230d54a82c18b21ea778b695d61; version=40e20d68bb3fb1ce2704c886d597918988d3321d <332e555dca074c4eb2084898021c3676423814c3; version=40e20d68bb3fb1ce2704c886d597918988d3321d <35f9e861d9b9434903a8ede37a3561f78985826d; version=40e20d68bb3fb1ce2704c886d597918988d3321d <66efb665cd5ad69b27dca8571bf89fc6b9c628a4; version=40e20d68bb3fb1ce2704c886d597918988d3321d <a23098cc32860272dc6c3200ff20c34c65b7b694; version=40e20d68bb3fb1ce2704c886d597918988d3321d <b9ca8585c766616563cf3c062c6878f61f83cf00; version=40e20d68bb3fb1ce2704c886d597918988d3321d <c9df8ff290097aabd5c9200f7f729b0813d37b19; version=40e20d68bb3fb1ce2704c886d597918988d3321d <fc7b19f547bc9e622060a0a9a39da2330aa21c53

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

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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

T1499Endpoint Denial of Service

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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