CVE-2021-47306 net: fddi: fix UAF in fza_probe

2024-05-2114:35:26

Linux

github.com

linux kernel

vulnerability

net

fddi

uaf

fix

free_netdev

turbochannel adapter

cve-2021-47306

AI Score

6.9

Confidence

Low

EPSS

Percentile

15.5%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

net: fddi: fix UAF in fza_probe

fp is netdev private data and it cannot be
used after free_netdev() call. Using fp after free_netdev()
can cause UAF bug. Fix it by moving free_netdev() after error message.

TURBOchannel adapter")

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "61414f5ec983",
        "lessThan": "04b06716838b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61414f5ec983",
        "lessThan": "f33605908a9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61414f5ec983",
        "lessThan": "bdfbb51f7a43",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "61414f5ec983",
        "lessThan": "deb7178eb940",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/fddi/defza.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.20"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.20",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "5.4.135",
        "versionType": "custom",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.53",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.13.5",
        "versionType": "custom",
        "lessThanOrEqual": "5.13.*"
      },
      {
        "status": "unaffected",
        "version": "5.14",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/fddi/defza.c"
    ],
    "defaultStatus": "affected"
  }
]