{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b46acd6a6a627d876898e1c84d3f84902264b445"
            },
            {
              "fixed": "8e64d33198b5a0fb14a452708bad844f94f03b2c"
            },
            {
              "fixed": "1393a467a9607e62123806de7d4c3a3e54e396a9"
            },
            {
              "fixed": "f90b8a1798b750755a9e9aee66678f0a1820bbaf"
            },
            {
              "fixed": "4b1613d7e2deda831a97e427d1ea586e50fe1be5"
            },
            {
              "fixed": "0112e6279420d4005b3d57af36fb45c01b8d0116"
            },
            {
              "fixed": "f79d0403ea20a81bc29105bba54fbcab54e8c403"
            },
            {
              "fixed": "0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.84"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.25"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31716.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate rec-\u003eused in journal-replay file record check\n\ncheck_file_record() validates rec-\u003etotal against the record size but\nnever validates rec-\u003eused.  The do_action() journal-replay handlers read\nrec-\u003eused from disk and use it to compute memmove lengths:\n\n  DeleteAttribute:    memmove(attr, ..., used - asize - roff)\n  CreateAttribute:    memmove(..., attr, used - roff)\n  change_attr_size:   memmove(..., used - PtrOffset(rec, next))\n\nWhen rec-\u003eused is smaller than the offset of a validated attribute, or\nlarger than the record size, these subtractions can underflow allowing\nus to copy huge amounts of memory in to a 4kb buffer, generally\nconsidered a bad idea overall.\n\nThis requires a corrupted filesystem, which isn't a threat model the\nkernel really needs to worry about, but checking for such an obvious\nout-of-bounds value is good to keep things robust, especially on journal\nreplay\n\nFix this up by bounding rec-\u003eused correctly.\n\nThis is much like commit b2bc7c44ed17 (\"fs/ntfs3: Fix slab-out-of-bounds\nread in DeleteIndexEntryRoot\") which checked different values in this\nsame switch statement.",
  "id": "CVE-2026-31716",
  "modified": "2026-07-08T05:36:54.380552105Z",
  "published": "2026-05-01T13:56:11.263Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0112e6279420d4005b3d57af36fb45c01b8d0116"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ca0485e4b2e837ebb6cbd4f2451aba665a03e4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1393a467a9607e62123806de7d4c3a3e54e396a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b1613d7e2deda831a97e427d1ea586e50fe1be5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e64d33198b5a0fb14a452708bad844f94f03b2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f79d0403ea20a81bc29105bba54fbcab54e8c403"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f90b8a1798b750755a9e9aee66678f0a1820bbaf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31716.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31716"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fs/ntfs3: validate rec-\u003eused in journal-replay file record check"
}