GHSA-M6XX-FPFC-5X79

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-23 15:33
VLAI
Details

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

mm/damon/ops-common: putback folios on invalid migrate nid

damon_pa_migrate() and damos_va_migrate() isolate folios into a local list and then call damon_migrate_pages(). When target_nid is invalid (including the scheme default NUMA_NO_NODE / -1), damon_migrate_pages() returns early without putting the folios back to the LRU.

Callers then discard the list head while those folios remain isolated with an extra reference taken by folio_isolate_lru(). The pages stay off the LRU for as long as the mapping exists (anon active+inactive counts drop while RSS does not), and the leftover references can pin the pages after the mapping is gone.

Put the folios back on the invalid-nid path so ignored migration requests still return them to the LRU.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74644"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/ops-common: putback folios on invalid migrate nid\n\ndamon_pa_migrate() and damos_va_migrate() isolate folios into a local list\nand then call damon_migrate_pages().  When target_nid is invalid\n(including the scheme default NUMA_NO_NODE / -1), damon_migrate_pages()\nreturns early without putting the folios back to the LRU.\n\nCallers then discard the list head while those folios remain isolated with\nan extra reference taken by folio_isolate_lru().  The pages stay off the\nLRU for as long as the mapping exists (anon active+inactive counts drop\nwhile RSS does not), and the leftover references can pin the pages after\nthe mapping is gone.\n\nPut the folios back on the invalid-nid path so ignored migration requests\nstill return them to the LRU.",
  "id": "GHSA-m6xx-fpfc-5x79",
  "modified": "2026-08-23T15:33:04Z",
  "published": "2026-08-22T18:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74644"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/460181e4bb47a57776c64f0832c2096de8878cb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5deb65c34e682e7c5f5df417a70e223e8fcc5f5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7001c0a1bc9018cd5b2b72ebebb216d738b2ec81"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cfef454862b7d2776e0955b873dd59af6b47cfcb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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