{
  "threat_severity" : "Moderate",
  "public_date" : "2025-09-16T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ext4: fix i_disksize exceeding i_size problem in paritally written case",
    "id" : "2395662",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2395662"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-130",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\next4: fix i_disksize exceeding i_size problem in paritally written case\nIt is possible for i_disksize can exceed i_size, triggering a warning.\ngeneric_perform_write\ncopied = iov_iter_copy_from_user_atomic(len) // copied < len\next4_da_write_end\n| ext4_update_i_disksize\n|  new_i_size = pos + copied;\n|  WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize) // update i_disksize\n| generic_write_end\n|  copied = block_write_end(copied, len) // copied = 0\n|   if (unlikely(copied < len))\n|    if (!PageUptodate(page))\n|     copied = 0;\n|  if (pos + copied > inode->i_size) // return false\nif (unlikely(copied == 0))\ngoto again;\nif (unlikely(iov_iter_fault_in_readable(i, bytes))) {\nstatus = -EFAULT;\nbreak;\n}\nWe get i_disksize greater than i_size here, which could trigger WARNING\ncheck 'i_size_read(inode) < EXT4_I(inode)->i_disksize' while doing dio:\next4_dio_write_iter\niomap_dio_rw\n__iomap_dio_rw // return err, length is not aligned to 512\next4_handle_inode_extension\nWARN_ON_ONCE(i_size_read(inode) < EXT4_I(inode)->i_disksize) // Oops\nWARNING: CPU: 2 PID: 2609 at fs/ext4/file.c:319\nCPU: 2 PID: 2609 Comm: aa Not tainted 6.3.0-rc2\nRIP: 0010:ext4_file_write_iter+0xbc7\nCall Trace:\nvfs_write+0x3b1\nksys_write+0x77\ndo_syscall_64+0x39\nFix it by updating 'copied' value before updating i_disksize just like\next4_write_inline_data_end() does.\nA reproducer can be found in the buganizer link below." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-53270\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53270\nhttps://lore.kernel.org/linux-cve-announce/2025091603-CVE-2023-53270-4af2@gregkh/T" ],
  "name" : "CVE-2023-53270",
  "csaw" : false
}