CVE-2021-47602

2024-06-1915:15:54

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

vulnerability

cve-2021-47602

mac80211

qos data frames

admission control

uninitialized value

6.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

mac80211: track only QoS data frames for admission control

For admission control, obviously all of that only works for
QoS data frames, otherwise we cannot even access the QoS
field in the header.

Syzbot reported (see below) an uninitialized value here due
to a status of a non-QoS nullfunc packet, which isn’t even
long enough to contain the QoS header.

Fix this to only do anything for QoS data packets.

Affected configurations

Vulners

Node

linuxlinux_kernelRange3.19–4.19.222

linuxlinux_kernelRange4.20.0–5.4.168

linuxlinux_kernelRange5.5.0–5.10.88

linuxlinux_kernelRange5.11.0–5.15.11

linuxlinux_kernelRange5.16.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/mac80211/mlme.c"
    ],
    "versions": [
      {
        "version": "02219b3abca5",
        "lessThan": "69f054d6642c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "02219b3abca5",
        "lessThan": "46b9e29db201",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "02219b3abca5",
        "lessThan": "eed897a22230",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "02219b3abca5",
        "lessThan": "42d08e97b196",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "02219b3abca5",
        "lessThan": "d5e568c3a4ec",
        "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/mac80211/mlme.c"
    ],
    "versions": [
      {
        "version": "3.19",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.19",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.222",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.168",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.88",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.11",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]