{
  "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-2025-38626",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38626",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-08-22T16:00:34.867Z",
    "updatedAt": "2026-06-01T16:05:25.352Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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 trigger foreground gc during f2fs_map_blocks() in lfs mode",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to trigger foreground gc during f2fs_map_blocks() in lfs mode\n\nw/ \"mode=lfs\" mount option, generic/299 will cause system panic as below:\n\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/segment.c:2835!\nCall Trace:\n <TASK>\n f2fs_allocate_data_block+0x6f4/0xc50\n f2fs_map_blocks+0x970/0x1550\n f2fs_iomap_begin+0xb2/0x1e0\n iomap_iter+0x1d6/0x430\n __iomap_dio_rw+0x208/0x9a0\n f2fs_file_write_iter+0x6b3/0xfa0\n aio_write+0x15d/0x2e0\n io_submit_one+0x55e/0xab0\n __x64_sys_io_submit+0xa5/0x230\n do_syscall_64+0x84/0x2f0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0010:new_curseg+0x70f/0x720\n\nThe root cause of we run out-of-space is: in f2fs_map_blocks(), f2fs may\ntrigger foreground gc only if it allocates any physical block, it will be\na little bit later when there is multiple threads writing data w/\naio/dio/bufio method in parallel, since we always use OPU in lfs mode, so\nf2fs_map_blocks() does block allocations aggressively.\n\nIn order to fix this issue, let's give a chance to trigger foreground\ngc in prior to block allocation in f2fs_map_blocks().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c737047f4665232d1e26b3620bc62df334545451"
            },
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d2f280f43a2a9d918fd23169ff3a6f3b65c7cec5"
            },
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f289690f50a01c3e085d87853392d5b7436a4cee"
            },
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "82765ce5c7a56f9309ee45328e763610eaf11253"
            },
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "264ede8a52f18647ed5bb5f2bd9bf54f556ad8f5"
            },
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "385e64a0744584397b4b52b27c96703516f39968"
            },
            {
              "version": "36abef4e796d382e81a0c2d21ea5327481dd7154",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1005a3ca28e90c7a64fa43023f866b960a60f791"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.8"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.167",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.102",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.42",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.15.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "version": "6.16.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}