ubi: Fix use-after-free when volume resizing failed

{
  "id": "66b2fce51cc9bb3cce7e746429d6413cde3d4c154d4150b3bdc0bac08eea5cfb",
  "url": "https://osv.dev/vulnerability/CVE-2023-53800",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ubi: Fix use-after-free when volume resizing failed",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ubi: Fix use-after-free when volume resizing failed There is an use-after-free problem reported by KASAN: ================================================================== BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi] Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735 CPU: 2 PID: 4735 Comm: ubirsvol Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: dump_stack_lvl+0x34/0x44 print_report+0x171/0x472 kasan_report+0xad/0x130 ubi_eba_copy_table+0x11f/0x1c0 [ubi] ubi_resize_volume+0x4f9/0xbc0 [ubi] ubi_cdev_ioctl+0x701/0x1850 [ubi] __x64_sys_ioctl+0x11d/0x170 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 When ubi_change_vtbl_record() returns an error in ubi_resize_volume(), \"new_eba_tbl\" will be freed on error handing path, but it is holded by \"vol->eba_tbl\" in ubi_eba_replace_table(). It means that the liftcycle of \"vol->eba_tbl\" and \"vol\" are different, so when resizing volume in next time, it causing an use-after-free fault. Fix it by not freeing \"new_eba_tbl\" after it replaced in ubi_eba_replace_table(), while will be freed in next volume resizing.",
    "evidence": "osv:CVE-2023-53800",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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    "severity": "high",
    "structured": {
      "id": "CVE-2023-53800",
      "aliases": [
        "CVE-2023-53800"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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      "modified": "2026-10-28T02:30:37.213044765Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093",
        "https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c",
        "https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797",
        "https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472",
        "https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b",
        "https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0",
        "https://git.kernel.org/stable/c/bf795ebbb9995e2fe7945de71177f01c2f1215dc",
        "https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53800.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53800",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53800.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53800",
        "evidence": "/id"
      }
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504040,
  "published_at": "2025-12-09T00:00:56.507+00:00"
}