{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2023-53826",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53826",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-09T01:29:39.679Z",
    "updatedAt": "2026-05-11T19:52:16.903Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()\n\nWear-leveling entry could be freed in error path, which may be accessed\nagain in eraseblk_count_seq_show(), for example:\n\n__erase_worker                eraseblk_count_seq_show\n                                wl = ubi->lookuptbl[*block_number]\n\t\t\t\tif (wl)\n  wl_entry_destroy\n    ubi->lookuptbl[e->pnum] = NULL\n    kmem_cache_free(ubi_wl_entry_slab, e)\n\t\t                   erase_count = wl->ec  // UAF!\n\nWear-leveling entry updating/accessing in ubi->lookuptbl should be\nprotected by ubi->wl_lock, fix it by adding ubi->wl_lock to serialize\nwl entry accessing between wl_entry_destroy() and\neraseblk_count_seq_show().\n\nFetch a reproducer in [Link].",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3f9b63dfce44a7c3c095dd93d910408e07ab1845"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "84250da1c63cb7d421a3b4812b5c2ce2e47d31a1"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1cb14c06d6035539ef4215c4ba0871aea71d7c38"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9d448dd6bcb61a508204b57ea1f454ba9bac2f24"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "79548ccdd992707879b4b683b7251c58ddf26f12"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "84253f3c2dad6be10d30c92626c763d9a9f512ad"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a100de2974d208cfca032179b02ed4d1a0a7f143"
            },
            {
              "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a240bc5c43130c6aa50831d7caaa02a1d84e1bce"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.22",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.22"
            },
            {
              "version": "4.14.308",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.276",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.235",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.173",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.100",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.18",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.2.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "version": "6.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}