{
  "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-2023-53149",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53149",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-09-15T14:03:13.334Z",
    "updatedAt": "2026-05-11T19:39:23.629Z",
    "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": "ext4: avoid deadlock in fs reclaim with page writeback",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid deadlock in fs reclaim with page writeback\n\nExt4 has a filesystem wide lock protecting ext4_writepages() calls to\navoid races with switching of journalled data flag or inode format. This\nlock can however cause a deadlock like:\n\nCPU0                            CPU1\n\next4_writepages()\n  percpu_down_read(sbi->s_writepages_rwsem);\n                                ext4_change_inode_journal_flag()\n                                  percpu_down_write(sbi->s_writepages_rwsem);\n                                    - blocks, all readers block from now on\n  ext4_do_writepages()\n    ext4_init_io_end()\n      kmem_cache_zalloc(io_end_cachep, GFP_KERNEL)\n        fs_reclaim frees dentry...\n          dentry_unlink_inode()\n            iput() - last ref =>\n              iput_final() - inode dirty =>\n                write_inode_now()...\n                  ext4_writepages() tries to acquire sbi->s_writepages_rwsem\n                    and blocks forever\n\nMake sure we cannot recurse into filesystem reclaim from writeback code\nto avoid the deadlock.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2ec97dc90df40c50e509809dc9a198638a7e18b6"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4b4340bf04ce9a52061f15000ecedd126abc093c"
            },
            {
              "version": "c8585c6fcaf2011de54c3592e80a634a2b9e1a7f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "00d873c17e29cc32d90ca852b82685f1673acaa5"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.7"
            },
            {
              "version": "6.2.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.2.*"
            },
            {
              "version": "6.3.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "version": "6.4",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}