CVE-2024-27063 leds: trigger: netdev: Fix kernel panic on interface rename trig notify

2024-05-0113:00:24

Linux

www.cve.org

linux kernel

vulnerability resolved

kernel panic

interface rename

trigger event

netdev

generic function

carrier

trigger_data struct

netdev_register

get_device_state

6.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

leds: trigger: netdev: Fix kernel panic on interface rename trig notify

Commit d5e01266e7f5 (“leds: trigger: netdev: add additional specific link
speed mode”) in the various changes, reworked the way to set the LINKUP
mode in commit cee4bd16c319 (“leds: trigger: netdev: Recheck
NETDEV_LED_MODE_LINKUP on dev rename”) and moved it to a generic function.

This changed the logic where, in the previous implementation the dev
from the trigger event was used to check if the carrier was ok, but in
the new implementation with the generic function, the dev in
trigger_data is used instead.

This is problematic and cause a possible kernel panic due to the fact
that the dev in the trigger_data still reference the old one as the
new one (passed from the trigger event) still has to be hold and saved
in the trigger_data struct (done in the NETDEV_REGISTER case).

On calling of get_device_state(), an invalid net_dev is used and this
cause a kernel panic.

To handle this correctly, move the call to get_device_state() after the
new net_dev is correctly set in trigger_data (in the NETDEV_REGISTER
case) and correctly parse the new dev.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/leds/trigger/ledtrig-netdev.c"
    ],
    "versions": [
      {
        "version": "d5e01266e7f5",
        "lessThan": "10f2af1af8ab",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d5e01266e7f5",
        "lessThan": "acd025c7a7d1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d5e01266e7f5",
        "lessThan": "3f360227cb46",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d5e01266e7f5",
        "lessThan": "415798bc07dd",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/leds/trigger/ledtrig-netdev.c"
    ],
    "versions": [
      {
        "version": "6.5",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.5",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.24",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.12",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.3",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]