GHSA-469F-R242-GQ7H

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-13 21:31
VLAI?
Details

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

jfs: nlink overflow in jfs_rename

If nlink is maximal for a directory (-1) and inside that directory you perform a rename for some child directory (not moving from the parent), then the nlink of the first directory is first incremented and later decremented. Normally this is fine, but when nlink = -1 this causes a wrap around to 0, and then drop_nlink issues a warning.

After applying the patch syzbot no longer issues any warnings. I also ran some basic fs tests to look for any regressions.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-71292"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: nlink overflow in jfs_rename\n\nIf nlink is maximal for a directory (-1) and inside that directory you\nperform a rename for some child directory (not moving from the parent),\nthen the nlink of the first directory is first incremented and later\ndecremented. Normally this is fine, but when nlink = -1 this causes a\nwrap around to 0, and then drop_nlink issues a warning.\n\nAfter applying the patch syzbot no longer issues any warnings. I also\nran some basic fs tests to look for any regressions.",
  "id": "GHSA-469f-r242-gq7h",
  "modified": "2026-05-13T21:31:57Z",
  "published": "2026-05-06T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71292"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2108829a59f081e822fdab8c2cd7131deb8aa8a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d77c36cd4b698649f5c30c5f6c084f4f61d1880"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9218dc26fd922b09858ecd3666ed57dfd8098da8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93c325746ae59709b4f9bad4e3e4761c8d566c70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3d66089e50a6e0142f8884471f74292102ea9aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4330a0d0947fbdc9d445cbbeabd8cc910a8c9ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f70fcbc2ac7c24f087a2c895c5753aa730b1e479"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe136426e30ca6debcf916fd6a141555ed9fde74"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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