CVE-2024-50023

Summary

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

net: phy: Remove LED entry from LEDs list on unregister

Commit c938ab4da0eb ("net: phy: Manual remove LEDs to ensure correct ordering") correctly fixed a problem with using devm_ but missed removing the LED entry from the LEDs list.

This cause kernel panic on specific scenario where the port for the PHY is torn down and up and the kmod for the PHY is removed.

On setting the port down the first time, the assosiacted LEDs are correctly unregistered. The associated kmod for the PHY is now removed. The kmod is now added again and the port is now put up, the associated LED are registered again. On putting the port down again for the second time after these step, the LED list now have 4 elements. With the first 2 already unregistered previously and the 2 new one registered again.

This cause a kernel panic as the first 2 element should have been removed.

Fix this by correctly removing the element when LED is unregistered.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc938ab4da0eb1620ae3243b0b24c572ddfc318fc < 143ffa7878e2d9d9c3836ee8304ce4930f7852a3affected
LinuxLinuxc938ab4da0eb1620ae3243b0b24c572ddfc318fc < fba363f4d244269a0ba7abb8df953a244c6749afaffected
LinuxLinuxc938ab4da0eb1620ae3243b0b24c572ddfc318fc < f50b5d74c68e551667e265123659b187a30fe3a5affected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.57 <= 6.6.*unaffected
LinuxLinux6.11.4 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References