GHSA-C9J4-H9XP-P2MJ

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31
VLAI
Details

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

xfrm: input: hold netns during deferred transport reinjection

Transport-mode reinjection stores a struct net pointer in skb->cb and uses it later from xfrm_trans_reinject(). That pointer must stay valid until the deferred callback runs.

Take a netns reference when queueing deferred reinjection work and drop it after the callback completes. Use maybe_get_net() so the queueing path does not revive a namespace that is already being torn down.

This keeps the existing workqueue design and fixes the netns lifetime handling in one place for all users of xfrm_trans_queue_net().

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-63919"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:10Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: input: hold netns during deferred transport reinjection\n\nTransport-mode reinjection stores a struct net pointer in skb-\u003ecb and\nuses it later from xfrm_trans_reinject(). That pointer must stay valid\nuntil the deferred callback runs.\n\nTake a netns reference when queueing deferred reinjection work and drop\nit after the callback completes. Use maybe_get_net() so the queueing\npath does not revive a namespace that is already being torn down.\n\nThis keeps the existing workqueue design and fixes the netns lifetime\nhandling in one place for all users of xfrm_trans_queue_net().",
  "id": "GHSA-c9j4-h9xp-p2mj",
  "modified": "2026-07-20T15:31:51Z",
  "published": "2026-07-19T18:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63919"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2df7059a18afb7d3aee6c36cad5d371c198111d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48ce101cd630d6745b6923b5bad8358bc4c119da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55ddfc41451f01c588089cd74957a05311b6f202"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ee59eda8820b758ed29e1cd3222359c7b97302c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8dfabcba6a943a7a02ebe1e1637c361ba96acbaa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f67a36e91bb50d358760f381f233913fe5c09f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f7ebb45a83afc3216e855e57d51bb4bc9b5232e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c16f74dc1d75d0e2e7670076d5375deda110ebeb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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