GHSA-C9PP-C247-8XGH

Vulnerability from github – Published: 2026-06-03 18:33 – Updated: 2026-06-03 18:33
VLAI
Details

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

nfc: hci: shdlc: Stop timers and work before freeing context

llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc structure while its timers and state machine work may still be active.

Timer callbacks can schedule sm_work, and sm_work accesses SHDLC state and the skb queues. If teardown happens in parallel with a queued/running work item, it can lead to UAF and other shutdown races.

Stop all SHDLC timers and cancel sm_work synchronously before purging the queues and freeing the context.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46267"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-03T18:16:28Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: hci: shdlc: Stop timers and work before freeing context\n\nllc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc\nstructure while its timers and state machine work may still be active.\n\nTimer callbacks can schedule sm_work, and sm_work accesses SHDLC state\nand the skb queues. If teardown happens in parallel with a queued/running\nwork item, it can lead to UAF and other shutdown races.\n\nStop all SHDLC timers and cancel sm_work synchronously before purging the\nqueues and freeing the context.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.",
  "id": "GHSA-c9pp-c247-8xgh",
  "modified": "2026-06-03T18:33:13Z",
  "published": "2026-06-03T18:33:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46267"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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