CVE-2022-49346

Local service interruption via device-node refcount leak

Published Feb 26, 2025 · Updated May 11, 2026

Reference-count leak in Linux 4.20 through branch-specific fixes allows local users to interrupt service through GSWIP probe failures. The gswip_gphy_fw_list function exits its child-node loop after a failed firmware probe without releasing gphy_fw_np, retaining a device-tree node reference. A Lantiq GSWIP device-tree configuration and low-privilege local access are required, but the public record does not disclose how the user triggers the failing probe.

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

Reference-count leak in Linux 4.20 through branch-specific fixes allows local users to interrupt service through GSWIP probe failures. The gswip_gphy_fw_list function exits its child-node loop after a failed firmware probe without releasing gphy_fw_np, retaining a device-tree node reference. A Lantiq GSWIP device-tree configuration and low-privilege local access are required, but the public record does not disclose how the user triggers the failing probe.

The record

CVE
CVE-2022-49346
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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=14fceff4771e51b23b4485b575cf9e5b3414b89b <0737e018a05e2aa352828c52bdeed3b02cff2930
  2. Affected versionversion=14fceff4771e51b23b4485b575cf9e5b3414b89b <2e007ac6fa7c9c94ad84da075c5c504afad690a0
  3. Affected versionversion=14fceff4771e51b23b4485b575cf9e5b3414b89b <32cd78c5610f02a929f63cac985e73692d05f33e
  4. Affected versionversion=14fceff4771e51b23b4485b575cf9e5b3414b89b <54d6802c4d83fa8de7696cfec06f475d5fd92d27
  5. Affected versionversion=14fceff4771e51b23b4485b575cf9e5b3414b89b <7c8df6fad43d9d5d77f281f794b2a93cd02fd1a9
  6. Affected versionversion=14fceff4771e51b23b4485b575cf9e5b3414b89b <c2ae49a113a5344232f1ebb93bcf18bbd11e9c39
  7. Affected versionversion=4.20

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=14fceff4771e51b23b4485b575cf9e5b3414b89b <0737e018a05e2aa352828c52bdeed3b02cff2930; version=14fceff4771e51b23b4485b575cf9e5b3414b89b <2e007ac6fa7c9c94ad84da075c5c504afad690a0; version=14fceff4771e51b23b4485b575cf9e5b3414b89b <32cd78c5610f02a929f63cac985e73692d05f33e; version=14fceff4771e51b23b4485b575cf9e5b3414b89b <54d6802c4d83fa8de7696cfec06f475d5fd92d27; version=14fceff4771e51b23b4485b575cf9e5b3414b89b <7c8df6fad43d9d5d77f281f794b2a93cd02fd1a9; version=14fceff4771e51b23b4485b575cf9e5b3414b89b <c2ae49a113a5344232f1ebb93bcf18bbd11e9c39; version=4.20

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

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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

No sourced classifications are available.

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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