net: mdiobus: fix unbalanced node reference count

Description

In the Linux kernel, the following vulnerability has been resolved: net: mdiobus: fix unbalanced node reference count I got the following report while doing device(mscc-miim) load test with CONFIG_OF_UNITTEST and CONFIG_OF_DYNAMIC enabled: OF: ERROR: memory leak, expected refcount 1 instead of 2, of_node_get()/of_node_put() unbalanced - destroy cset entry: attach overlay node /spi/soc@0/mdio@7107009c/ethernet-phy@0 If the 'fwnode' is not an acpi node, the refcount is get in fwnode_mdiobus_phy_device_register(), but it has never been put when the device is freed in the normal path. So call fwnode_handle_put() in phy_device_release() to avoid leak. If it's an acpi node, it has never been get, but it's put in the error path, so call fwnode_handle_get() before phy_device_register() to keep get/put operation balanced.

Scores

EPSS (exploitation in 30 days)

0.24% · top 84% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Weakness

• CWE-401 (opens in a new tab)All about CWE-401 and its CVEs

Affected products

• Linux · Linux

  • affected bc1bee3b87ee48bd97ef7fd306445132ba2041b0 – < 543d917f691ab06885ee779c862065899eaa4251
  • affected bc1bee3b87ee48bd97ef7fd306445132ba2041b0 – < 2708b357440427d6a9fee667eb7b8307f4625adc
  • affected bc1bee3b87ee48bd97ef7fd306445132ba2041b0 – < cdde1560118f82498fc9e9a7c1ef7f0ef7755891

• Linux · Linux

  • affected 5.14
  • unaffected < 5.14
  • unaffected 5.15.82 – ≤ 5.15.*
  • unaffected 6.0.12 – ≤ 6.0.*
  • unaffected 6.1 – ≤ *

References (3)

• https://git.kernel.org/stable/c/543d917f691ab06885ee779c862065899eaa4251 (opens in a new tab)
• https://git.kernel.org/stable/c/2708b357440427d6a9fee667eb7b8307f4625adc (opens in a new tab)
• https://git.kernel.org/stable/c/cdde1560118f82498fc9e9a7c1ef7f0ef7755891 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-49016](https://trackcve.app/badge/CVE-2022-49016.svg)](https://trackcve.app/cve/CVE-2022-49016)

Record last updated 11 May 2026, 18:51 UTC.