{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1df8d75030b787a9fae270b59b93eef809dd2011"
            },
            {
              "fixed": "930a9c1c321efdaa3e7f8caecb0479cee3baf342"
            },
            {
              "fixed": "f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc"
            },
            {
              "fixed": "476582d754cdc5110f806001417fea6c77824c13"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98446.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't let hidden_space go negative in xfs_metafile_resv_init\n\nLOLLM points out that if the amount of fdblocks that we can reserve for\na metadata btree file goes below the space already used by that file,\nthen the hidden_space subtraction can underflow, causing\nxfs_dec_fdblocks to subtract a huge amount of space.  We never want the\ntarget to be less than the used sapce, so fix the logic that adjusts\ndblocks_avail downwards.\n\nAlso fix an error in the adjacent comment.",
  "id": "CVE-2026-98446",
  "modified": "2026-10-20T02:30:12.035499401Z",
  "published": "2026-10-18T15:14:56.724Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/476582d754cdc5110f806001417fea6c77824c13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/930a9c1c321efdaa3e7f8caecb0479cee3baf342"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0d8352a39f4a2e329ae45b71bb0d49e2ca0a6dc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98446.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98446"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "xfs: don't let hidden_space go negative in xfs_metafile_resv_init"
}