CVE-2024-26973 fat: fix uninitialized field in nostale filehandles

2024-05-0105:20:09

Linux

www.cve.org

linux kernel

vulnerability

fat file system

uninitialized field

nostale filehandles

fat_encode_fh_nostale

file handle

uninitialized information

userspace

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:

fat: fix uninitialized field in nostale filehandles

When fat_encode_fh_nostale() encodes file handle without a parent it
stores only first 10 bytes of the file handle. However the length of the
file handle must be a multiple of 4 so the file handle is actually 12
bytes long and the last two bytes remain uninitialized. This is not
great at we potentially leak uninitialized information with the handle
to userspace. Properly initialize the full handle length.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/fat/nfs.c"
    ],
    "versions": [
      {
        "version": "ea3983ace6b7",
        "lessThan": "9840d1897e28",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "f52d7663a10a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "a276c595c3a6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "b7fb63e807c6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "c8cc05de8e6b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "03a7e3f2ba3c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "74f852654b8b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "cdd33d54e789",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ea3983ace6b7",
        "lessThan": "fde2497d2bc3",
        "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/fat/nfs.c"
    ],
    "versions": [
      {
        "version": "3.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.10",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.312",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.274",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.215",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.154",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.84",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.24",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.12",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.3",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]