CVE-2022-48784

2024-07-1612:15:03

Linux

web.nvd.nist.gov

linux kernel

netlink vulnerability

cfg80211

AI Score

6.5

Confidence

High

EPSS

Percentile

16.0%

JSON

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

cfg80211: fix race in netlink owner interface destruction

My previous fix here to fix the deadlock left a race where
the exact same deadlock (see the original commit referenced
below) can still happen if cfg80211_destroy_ifaces() already
runs while nl80211_netlink_notify() is still marking some
interfaces as nl_owner_dead.

The race happens because we have two loops here - first we
dev_close() all the netdevs, and then we destroy them. If we
also have two netdevs (first one need only be a wdev though)
then we can find one during the first iteration, close it,
and go to the second iteration – but then find two, and try
to destroy also the one we didn’t close yet.

Fix this by only iterating once.

Affected configurations

Vulners

Node

linuxlinux_kernelRange5.13–5.15.25

linuxlinux_kernelRange5.16.0–5.16.11

linuxlinux_kernelRange5.17.0≥

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:a:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:a:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/wireless/core.c"
    ],
    "versions": [
      {
        "version": "ea6b2098dd02",
        "lessThan": "241e633cb379",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea6b2098dd02",
        "lessThan": "c979f792a2ba",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea6b2098dd02",
        "lessThan": "f0a6fd152706",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/wireless/core.c"
    ],
    "versions": [
      {
        "version": "5.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.13",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.25",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.11",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]