CVE-2022-49439

Service interruption via FSL RapidIO refcount leak

Published Feb 26, 2025 · Updated May 11, 2026

Memory leakage in the PowerPC FSL RapidIO setup path in Linux allows local users to cause a service interruption on affected systems. fsl_rio_setup obtains a referenced device-tree node through of_parse_phandle but fails to release it with of_node_put after use. Exploitation requires local low-privileged access and an affected PowerPC system using FSL RapidIO; successful exploitation exhausts kernel resources without reading or modifying data.

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

Memory leakage in the PowerPC FSL RapidIO setup path in Linux allows local users to cause a service interruption on affected systems. fsl_rio_setup obtains a referenced device-tree node through of_parse_phandle but fails to release it with of_node_put after use. Exploitation requires local low-privileged access and an affected PowerPC system using FSL RapidIO; successful exploitation exhausts kernel resources without reading or modifying data.

The record

CVE
CVE-2022-49439
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

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=3.3
  2. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <46fd994763cf6884b88a2da712af918f3ed54d7b
  3. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <51e25fbf20c9152d84a34b7afac15a41fe5c9116
  4. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <5607a77a365df8c0fd5ff43ac424812b95775527
  5. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <5b8aa2ba38c010f47c965dd9bb5a8561813ed649
  6. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <7b668a59ddfb32727e39b06fdf52b28e58c684e0
  7. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <bcb6c4c5eb4836a21411dfe8247bf9951eb6e7c3
  8. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <c70dd353d37158e06bf8d450d4b31a7091609924
  9. Affected versionversion=abc3aeae3aaa5c319d02f12649e17ea5929999aa <fcee96924ba1596ca80a6770b2567ca546f9a482

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <46fd994763cf6884b88a2da712af918f3ed54d7b; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <51e25fbf20c9152d84a34b7afac15a41fe5c9116; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <5607a77a365df8c0fd5ff43ac424812b95775527; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <5b8aa2ba38c010f47c965dd9bb5a8561813ed649; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <7b668a59ddfb32727e39b06fdf52b28e58c684e0; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <bcb6c4c5eb4836a21411dfe8247bf9951eb6e7c3; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <c70dd353d37158e06bf8d450d4b31a7091609924; version=abc3aeae3aaa5c319d02f12649e17ea5929999aa <fcee96924ba1596ca80a6770b2567ca546f9a482

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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 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.

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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