{
  "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-2026-23234",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23234",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-03-04T14:36:38.843Z",
    "updatedAt": "2026-05-11T22:02:55.136Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "f2fs: fix to avoid UAF in f2fs_write_end_io()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid UAF in f2fs_write_end_io()\n\nAs syzbot reported an use-after-free issue in f2fs_write_end_io().\n\nIt is caused by below race condition:\n\nloop device\t\t\t\tumount\n- worker_thread\n - loop_process_work\n  - do_req_filebacked\n   - lo_rw_aio\n    - lo_rw_aio_complete\n     - blk_mq_end_request\n      - blk_update_request\n       - f2fs_write_end_io\n        - dec_page_count\n        - folio_end_writeback\n\t\t\t\t\t- kill_f2fs_super\n\t\t\t\t\t - kill_block_super\n\t\t\t\t\t  - f2fs_put_super\n\t\t\t\t\t : free(sbi)\n       : get_pages(, F2FS_WB_CP_DATA)\n         accessed sbi which is freed\n\nIn kill_f2fs_super(), we will drop all page caches of f2fs inodes before\ncall free(sbi), it guarantee that all folios should end its writeback, so\nit should be safe to access sbi before last folio_end_writeback().\n\nLet's relocate ckpt thread wakeup flow before folio_end_writeback() to\nresolve this issue.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0fb58aff0dafd6837cc91f4154f3ed6e020358fa"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "505e1c0530db6152cab3feef8e3e4da3d3e358c9"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "acc2c97fc0005846e5cf11b5ba3189fef130c9b3"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "995030be4ce6338c6ff814583c14166446a64008"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a42f99be8a16b32a0bb91bb6dda212a6ad61be5d"
            },
            {
              "version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ce2739e482bce8d2c014d76c4531c877f382aa54"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.13"
            },
            {
              "version": "5.10.251",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.201",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.164",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.127",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.74",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}