GHSA-6FMR-6RHP-M3P8

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-10-30 15:33
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

f2fs: validate MOVE_RANGE destination size

F2FS_IOC_MOVE_RANGE checks the source range, but not the destination end before updating i_size. A source hole can expose this: __clone_blkaddrs() skips NULL_ADDR entries and returns success, so the caller can still extend the destination inode with unchecked pos_out + len.

Reject destination overflow and use inode_newsize_ok() before extending the destination inode.

Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-89840"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:16:50Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate MOVE_RANGE destination size\n\nF2FS_IOC_MOVE_RANGE checks the source range, but not the destination end\nbefore updating i_size. A source hole can expose this: __clone_blkaddrs()\nskips NULL_ADDR entries and returns success, so the caller can still extend\nthe destination inode with unchecked pos_out + len.\n\nReject destination overflow and use inode_newsize_ok() before extending\nthe destination inode.",
  "id": "GHSA-6fmr-6rhp-m3p8",
  "modified": "2026-10-30T15:33:29Z",
  "published": "2026-09-16T12:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89840"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/454de20a5a36c000b75f49337aae8c92045c5242"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54c587f3f95ce2d6932a16566db83f73cc4313e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bca61ee5192ea47003722486ae9588a2a4bb47b6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db13064669526494cd78ba3a4394063b740e940c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcae1eeda53149f219dd6af93b3083b7271c1c63"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e533889fc26aea0cd83c90327063f272061dd820"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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