ghsa-j793-r5pf-7w34
Vulnerability from github
Published
2025-04-17 21:30
Modified
2025-04-17 21:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

ext4: fix memory leak in parse_apply_sb_mount_options()

If processing the on-disk mount options fails after any memory was allocated in the ext4_fs_context, e.g. s_qf_names, then this memory is leaked. Fix this by calling ext4_fc_free() instead of kfree() directly.

Reproducer:

mkfs.ext4 -F /dev/vdc
tune2fs /dev/vdc -E mount_opts=usrjquota=file
echo clear > /sys/kernel/debug/kmemleak
mount /dev/vdc /vdc
echo scan > /sys/kernel/debug/kmemleak
sleep 5
echo scan > /sys/kernel/debug/kmemleak
cat /sys/kernel/debug/kmemleak
Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49408"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:17Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix memory leak in parse_apply_sb_mount_options()\n\nIf processing the on-disk mount options fails after any memory was\nallocated in the ext4_fs_context, e.g. s_qf_names, then this memory is\nleaked.  Fix this by calling ext4_fc_free() instead of kfree() directly.\n\nReproducer:\n\n    mkfs.ext4 -F /dev/vdc\n    tune2fs /dev/vdc -E mount_opts=usrjquota=file\n    echo clear \u003e /sys/kernel/debug/kmemleak\n    mount /dev/vdc /vdc\n    echo scan \u003e /sys/kernel/debug/kmemleak\n    sleep 5\n    echo scan \u003e /sys/kernel/debug/kmemleak\n    cat /sys/kernel/debug/kmemleak",
  "id": "GHSA-j793-r5pf-7w34",
  "modified": "2025-04-17T21:30:44Z",
  "published": "2025-04-17T21:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49408"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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