Riskcovery

CVE-2025-39805

net: macb: fix unregister_netdev call order in macb_remove()

State
Published
Severity
Not scored
Published
Sep 16, 2025
Updated
May 11, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

net: macb: fix unregister_netdev call order in macb_remove()

When removing a macb device, the driver calls phy_exit() before unregister_netdev(). This leads to a WARN from kernfs:

------------[ cut here ]------------ kernfs: can not remove 'attached_dev', no directory WARNING: CPU: 1 PID: 27146 at fs/kernfs/dir.c:1683 Call trace: kernfs_remove_by_name_ns+0xd8/0xf0 sysfs_remove_link+0x24/0x58 phy_detach+0x5c/0x168 phy_disconnect+0x4c/0x70 phylink_disconnect_phy+0x6c/0xc0 [phylink] macb_close+0x6c/0x170 [macb] ... macb_remove+0x60/0x168 [macb] platform_remove+0x5c/0x80 ...

The warning happens because the PHY is being exited while the netdev is still registered. The correct order is to unregister the netdev before shutting down the PHY and cleaning up the MDIO bus.

Fix this by moving unregister_netdev() ahead of phy_exit() in macb_remove().

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 8b73fa3ae02b2401960de41b0454c0321377b203 to before 7351782f2fc8ac31ced52e3d4e6fa120f819a7abAffected
  • 8b73fa3ae02b2401960de41b0454c0321377b203 to before 2b9719ccad38dffad7dbdd2f39896f723f9b9011Affected
  • 8b73fa3ae02b2401960de41b0454c0321377b203 to before ff0d3bad32108b57265e5b48f15327549af771d3Affected
  • 8b73fa3ae02b2401960de41b0454c0321377b203 to before 775fe690fd4a3337ad2115de2adb41b227d4dae7Affected
  • 8b73fa3ae02b2401960de41b0454c0321377b203 to before 01b9128c5db1b470575d07b05b67ffa3cb02ebf1Affected
LinuxLinux
  • 5.18Affected
  • before 5.18Not affected
  • 6.1.159 through 6.1.*Not affected
  • 6.6.119 through 6.6.*Not affected
  • 6.12.45 through 6.12.*Not affected
  • 6.16.5 through 6.16.*Not affected
  • 6.17 and laterNot affected

References

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