ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed

{
  "id": "4aaca58ed39e016d043ceba3b73d22ba052bfae0616277d7ede4f7bde04cc684",
  "url": "https://osv.dev/vulnerability/CVE-2023-53481",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed Following process will trigger an infinite loop in ubi_wl_put_peb(): ubifs_bgt ubi_bgt ubifs_leb_unmap ubi_leb_unmap ubi_eba_unmap_leb ubi_wl_put_peb wear_leveling_worker e1 = rb_entry(rb_first(&ubi->used) e2 = get_peb_for_wl(ubi) ubi_io_read_vid_hdr // return err (flash fault) out_error: ubi->move_from = ubi->move_to = NULL wl_entry_destroy(ubi, e1) ubi->lookuptbl[e->pnum] = NULL retry: e = ubi->lookuptbl[pnum]; // return NULL if (e == ubi->move_from) { // NULL == NULL gets true goto retry; // infinite loop !!! $ top PID USER PR NI VIRT RES SHR S %CPU %MEM COMMAND 7676 root 20 0 0 0 0 R 100.0 0.0 ubifs_bgt0_0 Fix it by: 1) Letting ubi_wl_put_peb() returns directly if wearl leveling entry has been removed from 'ubi->lookuptbl'. 2) Using 'ubi->wl_lock' protecting wl entry deletion to preventing an use-after-free problem for wl entry in ubi_wl_put_peb(). Fetch a reproducer in [Link].",
    "evidence": "osv:CVE-2023-53481",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.14.308",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "4.19.276",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.235",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.173",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.100",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.2.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-53481",
      "aliases": [
        "CVE-2023-53481"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "b40d2fbf47af58377e898b5062077a47bb28a132"
                },
                {
                  "fixed": "f006f596fe851c3b6aae60b79f89f89f0e515d2f"
                },
                {
                  "fixed": "b5be23f6ae610bdb262160a1f294afee6d0e6a69"
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                {
                  "fixed": "8a18856e074479bd050b01e688c58defadce7ab0"
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                {
                  "fixed": "3afaaf6f5867dc4ad383808d4053f428ec7b867d"
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                  "fixed": "cc4bc532acda66189bddc03b3fe1ad689d9a48a2"
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                  "fixed": "5af1c643184a5d09ff5b3f334077a4d0a163c677"
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                  "fixed": "4d57a7333e26040f2b583983e1970d9d460e56b0"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53481.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.25"
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                {
                  "fixed": "4.14.308"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53481.json"
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      ],
      "modified": "2026-10-28T02:30:35.099478134Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3afaaf6f5867dc4ad383808d4053f428ec7b867d",
        "https://git.kernel.org/stable/c/4d57a7333e26040f2b583983e1970d9d460e56b0",
        "https://git.kernel.org/stable/c/5af1c643184a5d09ff5b3f334077a4d0a163c677",
        "https://git.kernel.org/stable/c/8a18856e074479bd050b01e688c58defadce7ab0",
        "https://git.kernel.org/stable/c/b40d2fbf47af58377e898b5062077a47bb28a132",
        "https://git.kernel.org/stable/c/b5be23f6ae610bdb262160a1f294afee6d0e6a69",
        "https://git.kernel.org/stable/c/cc4bc532acda66189bddc03b3fe1ad689d9a48a2",
        "https://git.kernel.org/stable/c/f006f596fe851c3b6aae60b79f89f89f0e515d2f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53481.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53481",
        "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-2023-53481.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53481",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502160,
  "published_at": "2025-10-01T11:42:49.825+00:00"
}