CVE-2022-50572

Local denial of service via cpu_ep refcount leak

Published Oct 22, 2025 · Updated Oct 22, 2025

Reference-count leak in the Linux kernel allows local users to exhaust memory by exercising an affected ASoC audio graph error path. The __graph_for_each_link() error path in sound/soc/generic/audio-graph-card.c exits without calling of_node_put() on cpu_ep after of_get_next_child() increments its reference count. Local low-privilege access and a matching audio-graph configuration are required; repeated failures can consume kernel memory and interrupt service.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reference-count leak in the Linux kernel allows local users to exhaust memory by exercising an affected ASoC audio graph error path. The __graph_for_each_link() error path in sound/soc/generic/audio-graph-card.c exits without calling of_node_put() on cpu_ep after of_get_next_child() increments its reference count. Local low-privilege access and a matching audio-graph configuration are required; repeated failures can consume kernel memory and interrupt service.

The record

CVE
CVE-2022-50572
Published
Oct 22, 2025
Updated
Oct 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2025Record 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=5.1
  2. Affected versionversion=fce9b90c1ab7e915553c57353355700c79b39c86 <06c9d468c06806dab752eb8e72addbf3792c1023
  3. Affected versionversion=fce9b90c1ab7e915553c57353355700c79b39c86 <49dad92af6892f46851af989ef3aa7cd7316c389
  4. Affected versionversion=fce9b90c1ab7e915553c57353355700c79b39c86 <4cc8431ec77a43ea106d8bde0860c61cfdda1cd0
  5. Affected versionversion=fce9b90c1ab7e915553c57353355700c79b39c86 <85eb5c952b7fe2d2059beaa4a4dd26688b25547b
  6. Affected versionversion=fce9b90c1ab7e915553c57353355700c79b39c86 <8ab2d12c726f0fde0692fa5d81d8019b3dcd62d0
  7. Affected versionversion=fce9b90c1ab7e915553c57353355700c79b39c86 <ed1376f771404917c2ec3ebc617431ec01146134

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.1; version=fce9b90c1ab7e915553c57353355700c79b39c86 <06c9d468c06806dab752eb8e72addbf3792c1023; version=fce9b90c1ab7e915553c57353355700c79b39c86 <49dad92af6892f46851af989ef3aa7cd7316c389; version=fce9b90c1ab7e915553c57353355700c79b39c86 <4cc8431ec77a43ea106d8bde0860c61cfdda1cd0; version=fce9b90c1ab7e915553c57353355700c79b39c86 <85eb5c952b7fe2d2059beaa4a4dd26688b25547b; version=fce9b90c1ab7e915553c57353355700c79b39c86 <8ab2d12c726f0fde0692fa5d81d8019b3dcd62d0; version=fce9b90c1ab7e915553c57353355700c79b39c86 <ed1376f771404917c2ec3ebc617431ec01146134

Published CVSS scores

5.5SUSECVSS: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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