{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f1e6fb0ab451dae8523fbb8c119a653b2730e938"
            },
            {
              "fixed": "5e44b6944e11fd6647f028219ad0be4e85e9acee"
            },
            {
              "fixed": "d2a86329152c69a6200c15b2bf618755f8563826"
            },
            {
              "fixed": "0f18d712ba9c980e05b7e33a27cde4fe3ed2d393"
            },
            {
              "fixed": "e38587d98d1ceac608420052c0cdd901d25878f3"
            },
            {
              "fixed": "c6a67aa438179cad40f8ae45469e304338d65c0a"
            },
            {
              "fixed": "571ea4263d69df1b48578e4314a828ecd0604755"
            },
            {
              "fixed": "7565e44507634514e3e1899d3acad3de43f7a2c1"
            },
            {
              "fixed": "83e98dbf19ab64e8528e101e20f8d50e1aaa68a8"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.10.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90318.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfat: release buffer head after rebuilding parent\n\nfat_scan_logstart() leaves the matching directory entry's buffer head in\nsinfo.bh for the caller to release, just like fat_scan().\n\nfat_rebuild_parent() uses the directory entry to rebuild the parent inode\nfor the nostale_ro NFS export path, but does not release sinfo.bh after a\nsuccessful scan.  Release it once fat_build_inode() has consumed the\ndirectory entry data.",
  "id": "CVE-2026-90318",
  "modified": "2026-09-19T03:31:03.990213737Z",
  "published": "2026-09-17T16:08:36.174Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f18d712ba9c980e05b7e33a27cde4fe3ed2d393"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/571ea4263d69df1b48578e4314a828ecd0604755"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e44b6944e11fd6647f028219ad0be4e85e9acee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7565e44507634514e3e1899d3acad3de43f7a2c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83e98dbf19ab64e8528e101e20f8d50e1aaa68a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6a67aa438179cad40f8ae45469e304338d65c0a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2a86329152c69a6200c15b2bf618755f8563826"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e38587d98d1ceac608420052c0cdd901d25878f3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90318.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90318"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "fat: release buffer head after rebuilding parent"
}