{
  "cveId": "CVE-2023-53101",
  "url": "https://patchblox.com/security/cve/CVE-2023-53101",
  "summary": "CVE-2023-53101 is fixed in 20 products on 1 platform, first by ALAS2023-2023-148, released March 30, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ext4: zero i_disksize when initializing the boot...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ext4: zero i_disksize when initializing the bootloader inode  If the boot loader inode has never been used before, the EXT4_IOC_SWAP_BOOT inode will initialize it, including setting the i_size to 0.  However, if the \u0022never before used\u0022 boot loader has a non-zero i_size, then i_disksize will be non-zero, and the inconsistency between i_size and i_disksize can trigger a kernel warning:   WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319  CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa  RIP: 0010:ext4_file_write_iter\u002B0xbc7/0xd10  Call Trace:   vfs_write\u002B0x3b1/0x5c0   ksys_write\u002B0x77/0x160   __x64_sys_write\u002B0x22/0x30   do_syscall_64\u002B0x39/0x80  Reproducer:  1. create corrupted image and mount it:        mke2fs -t ext4 /tmp/foo.img 200        debugfs -wR \u0022sif \u003C5\u003E size 25700\u0022 /tmp/foo.img        mount -t ext4 /tmp/foo.img /mnt        cd /mnt        echo 123 \u003E file  2. Run the reproducer program:        posix_memalign(\u0026buf, 1024, 1024)        fd = open(\u0022file\u0022, O_RDWR | O_DIRECT);        ioctl(fd, EXT4_IOC_SWAP_BOOT);        write(fd, buf, 1024);  Fix this by setting i_disksize as well as i_size to zero when initiaizing the boot loader inode.",
  "published": "2023-03-30T21:11:00Z",
  "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": 0.00204,
  "epssPercentile": 0.10481,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.21-1.45",
      "release": "amzn 2023",
      "fixedVersion": "1.0-0.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53101",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53101",
      "released": "2025-05-02T16:15:29Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53101",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53101",
      "released": "2025-05-02T16:15:29Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53101",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53101",
      "released": "2025-05-02T16:15:29Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}