CVE-2026-46267 (GCVE-0-2026-46267)
Vulnerability from cvelistv5
Published
2026-06-03 15:50
Modified
2026-06-03 15:50
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
Version: 4a61cd6687fc6348d08724676d34e38160d6cf9b
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{
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-03T15:50:09.035Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e"
        },
        {
          "url": "https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98"
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        {
          "url": "https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab"
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          "url": "https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4"
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        },
        {
          "url": "https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f"
        }
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      "title": "nfc: hci: shdlc: Stop timers and work before freeing context",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46267",
    "datePublished": "2026-06-03T15:50:09.035Z",
    "dateReserved": "2026-05-13T15:03:33.108Z",
    "dateUpdated": "2026-06-03T15:50:09.035Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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