{
  "cveId": "CVE-2023-53468",
  "url": "https://patchblox.com/security/cve/CVE-2023-53468",
  "summary": "CVE-2023-53468 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53468, released October 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix memory leak in alloc_wbufs()  kmemlea...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ubifs: Fix memory leak in alloc_wbufs()  kmemleak reported a sequence of memory leaks, and show them as following:    unreferenced object 0xffff8881575f8400 (size 1024):     comm \u0022mount\u0022, pid 19625, jiffies 4297119604 (age 20.383s)     hex dump (first 32 bytes):       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................     backtrace:       [\u003Cffffffff8176cecd\u003E] __kmalloc\u002B0x4d/0x150       [\u003Cffffffffa0406b2b\u003E] ubifs_mount\u002B0x307b/0x7170 [ubifs]       [\u003Cffffffff819fa8fd\u003E] legacy_get_tree\u002B0xed/0x1d0       [\u003Cffffffff81936f2d\u003E] vfs_get_tree\u002B0x7d/0x230       [\u003Cffffffff819b2bd4\u003E] path_mount\u002B0xdd4/0x17b0       [\u003Cffffffff819b37aa\u003E] __x64_sys_mount\u002B0x1fa/0x270       [\u003Cffffffff83c14295\u003E] do_syscall_64\u002B0x35/0x80       [\u003Cffffffff83e0006a\u003E] entry_SYSCALL_64_after_hwframe\u002B0x46/0xb0    unreferenced object 0xffff8881798a6e00 (size 512):     comm \u0022mount\u0022, pid 19677, jiffies 4297121912 (age 37.816s)     hex dump (first 32 bytes):       6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk       6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk     backtrace:       [\u003Cffffffff8176cecd\u003E] __kmalloc\u002B0x4d/0x150       [\u003Cffffffffa0418342\u003E] ubifs_wbuf_init\u002B0x52/0x480 [ubifs]       [\u003Cffffffffa0406ca5\u003E] ubifs_mount\u002B0x31f5/0x7170 [ubifs]       [\u003Cffffffff819fa8fd\u003E] legacy_get_tree\u002B0xed/0x1d0       [\u003Cffffffff81936f2d\u003E] vfs_get_tree\u002B0x7d/0x230       [\u003Cffffffff819b2bd4\u003E] path_mount\u002B0xdd4/0x17b0       [\u003Cffffffff819b37aa\u003E] __x64_sys_mount\u002B0x1fa/0x270       [\u003Cffffffff83c14295\u003E] do_syscall_64\u002B0x35/0x80       [\u003Cffffffff83e0006a\u003E] entry_SYSCALL_64_after_hwframe\u002B0x46/0xb0  The problem is that the ubifs_wbuf_init() returns an error in the loop which in the alloc_wbufs(), then the wbuf-\u003Ebuf and wbuf-\u003Einodes that were successfully alloced before are not freed.  Fix it by adding error hanging path in alloc_wbufs() which frees the memory alloced before when ubifs_wbuf_init() returns an error.",
  "published": "2025-10-01T12:15:48Z",
  "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": 0.0016,
  "epssPercentile": 0.05165,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53468",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53468",
      "released": "2025-10-01T12:15:48Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53468",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53468",
      "released": "2025-10-01T12:15:48Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53468",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53468",
      "released": "2025-10-01T12:15:48Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}