CVE-2024-27021 r8169: fix LED-related deadlock on module removal

2024-05-0105:30:21

Linux

www.cve.org

linux kernel

vulnerability

deadlock

module removal

led

rtnl-related

7.6 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

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

r8169: fix LED-related deadlock on module removal

Binding devm_led_classdev_register() to the netdev is problematic
because on module removal we get a RTNL-related deadlock. Fix this
by avoiding the device-managed LED functions.

Note: We can safely call led_classdev_unregister() for a LED even
if registering it failed, because led_classdev_unregister() detects
this and is a no-op in this case.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ethernet/realtek/r8169.h",
      "drivers/net/ethernet/realtek/r8169_leds.c",
      "drivers/net/ethernet/realtek/r8169_main.c"
    ],
    "versions": [
      {
        "version": "18764b883e15",
        "lessThan": "53d986f39acd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "18764b883e15",
        "lessThan": "19fa4f2a85d7",
        "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/net/ethernet/realtek/r8169.h",
      "drivers/net/ethernet/realtek/r8169_leds.c",
      "drivers/net/ethernet/realtek/r8169_main.c"
    ],
    "versions": [
      {
        "version": "6.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.8",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]