CVE-2021-47236

2024-05-2115:15:12

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

web.nvd.nist.gov

linux kernel

net vulnerability

cdc_eem

skb leak fix

nvd

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

JSON

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

net: cdc_eem: fix tx fixup skb leak

when usbnet transmit a skb, eem fixup it in eem_tx_fixup(),
if skb_copy_expand() failed, it return NULL,
usbnet_start_xmit() will have no chance to free original skb.

fix it by free orginal skb in eem_tx_fixup() first,
then check skb clone status, if failed, return NULL to usbnet.

Affected configurations

Vulners

Node

linuxlinux_kernelRange2.6.30–4.4.274

linuxlinux_kernelRange4.5.0–4.9.274

linuxlinux_kernelRange4.10.0–4.14.238

linuxlinux_kernelRange4.15.0–4.19.196

linuxlinux_kernelRange4.20.0–5.4.128

linuxlinux_kernelRange5.5.0–5.10.46

linuxlinux_kernelRange5.11.0–5.12.13

linuxlinux_kernelRange5.13.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/usb/cdc_eem.c"
    ],
    "versions": [
      {
        "version": "9f722c0978b0",
        "lessThan": "f12554b0ff63",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "14184ec5c958",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "1bcacd6088d6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "f4e6a7f19c82",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "81de2ed06df8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "05b2b9f7d24b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "b4f7a9fc9d09",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9f722c0978b0",
        "lessThan": "c3b26fdf1b32",
        "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/usb/cdc_eem.c"
    ],
    "versions": [
      {
        "version": "2.6.30",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.30",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.4.274",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.274",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.238",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.196",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.128",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.46",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.13",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]