{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31516",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-31516"
  ],
  "published": "2026-04-22T13:57:42Z",
  "summary": "xfrm: prevent policy_hthresh.work from racing with netns teardown",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: prevent policy_hthresh.work from racing with netns teardown\n\nA XFRM_MSG_NEWSPDINFO request can queue the per-net work item\npolicy_hthresh.work onto the system workqueue.\n\nThe queued callback, xfrm_hash_rebuild(), retrieves the enclosing\nstruct net via container_of(). If the net namespace is torn down\nbefore that work runs, the associated struct net may already have\nbeen freed, and xfrm_hash_rebuild() may then dereference stale memory.\n\nxfrm_policy_fini() already flushes policy_hash_work during teardown,\nbut it does not synchronize policy_hthresh.work.\n\nSynchronize policy_hthresh.work in xfrm_policy_fini() as well, so the\nqueued work cannot outlive the net namespace teardown and access a\nfreed struct net.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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    {
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      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31516"
    },
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}