CVE-2022-49432

Service interruption via unreleased XICS node reference

Published Feb 26, 2025 · Updated May 11, 2026

Resource leakage in the Linux kernel powerpc/XICS code allows local users to interrupt service on OPAL-based PowerPC systems. In icp_opal_init(), of_find_compatible_node() increments the interrupt-controller node reference count, but the function omits of_node_put() before returning. Reachability requires the OPAL XICS initialization path; the retained reference consumes kernel resources without disclosing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in the Linux kernel powerpc/XICS code allows local users to interrupt service on OPAL-based PowerPC systems. In icp_opal_init(), of_find_compatible_node() increments the interrupt-controller node reference count, but the function omits of_node_put() before returning. Reachability requires the OPAL XICS initialization path; the retained reference consumes kernel resources without disclosing or modifying data.

The record

CVE
CVE-2022-49432
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
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=4.8
  2. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <1d5c8cea85fb1680eae8d645b96b92146cb4633c
  3. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <2357bd7499a81c70b460e2191852bbfc7b63c354
  4. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <537a317e5ff45d1f5a0ecaf6a0d7c8043c878cb1
  5. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <53f3f7f73e609b934083f896cb7ca2c2cb009b9f
  6. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <5dd9e27ea4a39f7edd4bf81e9e70208e7ac0b7c9
  7. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <6a61a97106279c2aa16fbbb2a171fd5dde127d23
  8. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <977dbc81d0f866ef63b93c127b7404f07734b3cc
  9. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <9a42bc2494fadb453de00ce61042e588563ddc6d
  10. Affected versionversion=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <df802880a7f9cd96b921b00639b00871f18a9a57

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <1d5c8cea85fb1680eae8d645b96b92146cb4633c; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <2357bd7499a81c70b460e2191852bbfc7b63c354; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <537a317e5ff45d1f5a0ecaf6a0d7c8043c878cb1; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <53f3f7f73e609b934083f896cb7ca2c2cb009b9f; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <5dd9e27ea4a39f7edd4bf81e9e70208e7ac0b7c9; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <6a61a97106279c2aa16fbbb2a171fd5dde127d23; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <977dbc81d0f866ef63b93c127b7404f07734b3cc; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <9a42bc2494fadb453de00ce61042e588563ddc6d; version=d74361881f0dfe5f9dcac37d1b753a15a2345d8c <df802880a7f9cd96b921b00639b00871f18a9a57

Published CVSS scores

5.5NVDCVSS: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

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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