CVE-2024-26820 hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed

2024-04-1709:43:47

Linux

github.com

linux kernel

vulnerability

resolved

driver

unloaded

reloaded

net_device_register

handler

vf register

netvsc_probe

register_netdevice_notifier

vmbus_driver_register

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

hv_netvsc: Register VF in netvsc_probe if NET_DEVICE_REGISTER missed

If hv_netvsc driver is unloaded and reloaded, the NET_DEVICE_REGISTER
handler cannot perform VF register successfully as the register call
is received before netvsc_probe is finished. This is because we
register register_netdevice_notifier() very early( even before
vmbus_driver_register()).
To fix this, we try to register each such matching VF( if it is visible
as a netdevice) at the end of netvsc_probe.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "028aa21f9e92",
        "lessThan": "bcb7164258d0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "997d895fa495",
        "lessThan": "c7441c77c91e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ff6c130e48a7",
        "lessThan": "5b10a88f64c0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "97683466e24c",
        "lessThan": "b6d46f306b39",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5dd83db613be",
        "lessThan": "309ef7de5d84",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7350c460f7f4",
        "lessThan": "a71302c86389",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "85520856466e",
        "lessThan": "4d29a58d96a7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "85520856466e",
        "lessThan": "9cae43da9867",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/hyperv/netvsc_drv.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.7",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "4.19.310",
        "versionType": "custom",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.272",
        "versionType": "custom",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.213",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.152",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.79",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.18",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7.6",
        "versionType": "custom",
        "lessThanOrEqual": "6.7.*"
      },
      {
        "status": "unaffected",
        "version": "6.8",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/hyperv/netvsc_drv.c"
    ],
    "defaultStatus": "affected"
  }
]