{
  "threat_severity" : "Low",
  "public_date" : "2025-12-30T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: exfat: use kvmalloc_array/kvfree instead of kmalloc_array/kfree",
    "id" : "2426196",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2426196"
  },
  "cvss3" : {
    "cvss3_base_score" : "3.3",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
    "status" : "verified"
  },
  "cwe" : "CWE-770",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nexfat: use kvmalloc_array/kvfree instead of kmalloc_array/kfree\nThe call stack shown below is a scenario in the Linux 4.19 kernel.\nAllocating memory failed where exfat fs use kmalloc_array due to\nsystem memory fragmentation, while the u-disk was inserted without\nrecognition.\nDevices such as u-disk using the exfat file system are pluggable and\nmay be insert into the system at any time.\nHowever, long-term running systems cannot guarantee the continuity of\nphysical memory. Therefore, it's necessary to address this issue.\nBinder:2632_6: page allocation failure: order:4,\nmode:0x6040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null)\nCall trace:\n[242178.097582]  dump_backtrace+0x0/0x4\n[242178.097589]  dump_stack+0xf4/0x134\n[242178.097598]  warn_alloc+0xd8/0x144\n[242178.097603]  __alloc_pages_nodemask+0x1364/0x1384\n[242178.097608]  kmalloc_order+0x2c/0x510\n[242178.097612]  kmalloc_order_trace+0x40/0x16c\n[242178.097618]  __kmalloc+0x360/0x408\n[242178.097624]  load_alloc_bitmap+0x160/0x284\n[242178.097628]  exfat_fill_super+0xa3c/0xe7c\n[242178.097635]  mount_bdev+0x2e8/0x3a0\n[242178.097638]  exfat_fs_mount+0x40/0x50\n[242178.097643]  mount_fs+0x138/0x2e8\n[242178.097649]  vfs_kern_mount+0x90/0x270\n[242178.097655]  do_mount+0x798/0x173c\n[242178.097659]  ksys_mount+0x114/0x1ac\n[242178.097665]  __arm64_sys_mount+0x24/0x34\n[242178.097671]  el0_svc_common+0xb8/0x1b8\n[242178.097676]  el0_svc_handler+0x74/0x90\n[242178.097681]  el0_svc+0x8/0x340\nBy analyzing the exfat code,we found that continuous physical memory\nis not required here,so kvmalloc_array is used can solve this problem.", "A memory allocation failure was found in the exFAT filesystem driver. When system memory is fragmented, kmalloc_array() can fail to allocate contiguous memory for the bitmap, preventing USB drives from being mounted." ],
  "statement" : "This is an availability issue affecting exFAT filesystem mounting under memory pressure. The fix uses kvmalloc_array() which falls back to vmalloc when contiguous memory is unavailable. No security boundary is crossed.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  } ],
  "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" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "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-2023-54194\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-54194\nhttps://lore.kernel.org/linux-cve-announce/2025123028-CVE-2023-54194-a396@gregkh/T" ],
  "name" : "CVE-2023-54194",
  "csaw" : false
}