{
  "cveId": "CVE-2021-47119",
  "url": "https://patchblox.com/security/cve/CVE-2021-47119",
  "summary": "CVE-2021-47119 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47119, released March 15, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ext4: fix memory leak in ext4_fill_super  Buffer...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ext4: fix memory leak in ext4_fill_super  Buffer head references must be released before calling kill_bdev(); otherwise the buffer head (and its page referenced by b_data) will not be freed by kill_bdev, and subsequently that bh will be leaked.  If blocksizes differ, sb_set_blocksize() will kill current buffers and page cache by using kill_bdev(). And then super block will be reread again but using correct blocksize this time. sb_set_blocksize() didn\u0027t fully free superblock page and buffer head, and being busy, they were not freed and instead leaked.  This can easily be reproduced by calling an infinite loop of:    systemctl start \u003Cext4_on_lvm\u003E.mount, and   systemctl stop \u003Cext4_on_lvm\u003E.mount  ... since systemd creates a cgroup for each slice which it mounts, and the bh leak get amplified by a dying memory cgroup that also never gets freed, and memory consumption is much more easily noticed.",
  "published": "2024-03-15T21:15:07Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00252,
  "epssPercentile": 0.16749,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47119",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47119",
      "released": "2024-03-15T21:15:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47119",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47119",
      "released": "2024-03-15T21:15:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47119",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47119",
      "released": "2024-03-15T21:15:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}