GHSA-VW2R-FFC4-8XM3

Vulnerability from github – Published: 2026-03-18 12:31 – Updated: 2026-07-14 15:31
VLAI
Details

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

net/sched: act_gate: snapshot parameters with RCU on replace

The gate action can be replaced while the hrtimer callback or dump path is walking the schedule list.

Convert the parameters to an RCU-protected snapshot and swap updates under tcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits the entry list, preserve the existing schedule so the effective state is unchanged.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-23245"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-18T11:16:16Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_gate: snapshot parameters with RCU on replace\n\nThe gate action can be replaced while the hrtimer callback or dump path is\nwalking the schedule list.\n\nConvert the parameters to an RCU-protected snapshot and swap updates under\ntcf_lock, freeing the previous snapshot via call_rcu(). When REPLACE omits\nthe entry list, preserve the existing schedule so the effective state is\nunchanged.",
  "id": "GHSA-vw2r-ffc4-8xm3",
  "modified": "2026-07-14T15:31:40Z",
  "published": "2026-03-18T12:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23245"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/035d0d09d5ab3ed3e93d18cde2b562a6719eea23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04d75529dc0f9be78786162ebab7424af4644df2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58b162e318d0243ad2d7d92456c0873f2494c351"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62413a9c3cb183afb9bb6e94dd68caf4e4145f4c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b1251bbf0f10ac745ed74bad4d3b433caa1eeae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfc314d7c767e350f78a46a8f8b134f80e8ad432"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc98fd8d214693be91253d9a88cdf8e5e143d124"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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