CVE-2021-47168 NFS: fix an incorrect limit in filelayout_decode_layout()

2024-03-2509:16:20

Linux

www.cve.org

nfs

linux kernel

vulnerability

memory corruption

cve-2021-47168

7.5 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

NFS: fix an incorrect limit in filelayout_decode_layout()

The “sizeof(struct nfs_fh)” is two bytes too large and could lead to
memory corruption. It should be NFS_MAXFHSIZE because that’s the size
of the ->data[] buffer.

I reversed the size of the arguments to put the variable on the left.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nfs/filelayout/filelayout.c"
    ],
    "versions": [
      {
        "version": "16b374ca439f",
        "lessThan": "9d280ab53df1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "b287521e9e94",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "f299522eda15",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "945ebef99722",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "e411df81cd86",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "9b367fe770b1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "d34fb628f6ef",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "16b374ca439f",
        "lessThan": "769b01ea68b6",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nfs/filelayout/filelayout.c"
    ],
    "versions": [
      {
        "version": "2.6.37",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.37",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.4.271",
        "lessThanOrEqual": "4.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.271",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.235",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.193",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.124",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.42",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.9",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]