CVE-2022-49591

Service interruption via device-node reference leak

Published Feb 26, 2025 · Updated May 11, 2026

Resource leak in the Microchip DSA driver in the Linux kernel allows local users to interrupt service during switch registration. ksz_switch_register() retains the reference returned by of_get_child_by_name() because it omits the corresponding of_node_put() call. Reachability requires a system using a supported Microchip KSZ DSA switch and execution of its registration path; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the Microchip DSA driver in the Linux kernel allows local users to interrupt service during switch registration. ksz_switch_register() retains the reference returned by of_get_child_by_name() because it omits the corresponding of_node_put() call. Reachability requires a system using a supported Microchip KSZ DSA switch and execution of its registration path; no data disclosure or modification is reported.

The record

CVE
CVE-2022-49591
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

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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=5.9
  2. Affected versionversion=912aae27c6af6605eae967ab540c5e26bd76d421 <4165e02716518bbbe9c9104b39530d40928bc7ce
  3. Affected versionversion=912aae27c6af6605eae967ab540c5e26bd76d421 <88ec2ff42da3ac93b2437dc52fe25cd4372148e6
  4. Affected versionversion=912aae27c6af6605eae967ab540c5e26bd76d421 <a14bd7475452c51835dd5a0cee4c8fa48dd0b539

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=912aae27c6af6605eae967ab540c5e26bd76d421 <4165e02716518bbbe9c9104b39530d40928bc7ce; version=912aae27c6af6605eae967ab540c5e26bd76d421 <88ec2ff42da3ac93b2437dc52fe25cd4372148e6; version=912aae27c6af6605eae967ab540c5e26bd76d421 <a14bd7475452c51835dd5a0cee4c8fa48dd0b539

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 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.

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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