thunderbolt: Fix KASAN reported use-after-free when request is canceled

{
  "id": "01dc9eef6c15ab94850d9dc34d71e0d136fba7d12fdad60a235567d8309dc3f3",
  "url": "https://osv.dev/vulnerability/CVE-2026-98694",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "thunderbolt: Fix KASAN reported use-after-free when request is canceled",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Fix KASAN reported use-after-free when request is canceled Alan reported that when doing stress testing sometimes KASAN notices use-after-free during control channel operation (stripped down keeping the relevant parts): BUG: KASAN: slab-use-after-free in tb_cfg_request_sync+0x240/0x250 [thunderbolt] Read of size 24 at addr ffff88811067f290 by task kworker/u40:2/1760 tb_cfg_request_sync+0x240/0x250 [thunderbolt] tb_cfg_read_raw+0x367/0x510 [thunderbolt] tb_cfg_read+0xec/0x240 [thunderbolt] tb_port_get_link_generation+0x258/0x420 [thunderbolt] tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt] tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt] tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt] tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt] tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt] process_one_work+0x675/0x1230 worker_thread+0x5e6/0xf70 kthread+0x365/0x470 ret_from_fork+0x54d/0x710 ret_from_fork_asm+0x1a/0x30 Allocated by task 1760: __kmalloc_cache_noprof+0x1ee/0x550 tb_cfg_read_raw+0x1d3/0x510 [thunderbolt] tb_cfg_read+0xec/0x240 [thunderbolt] tb_port_get_link_generation+0x258/0x420 [thunderbolt] tb_usb3_consumed_bandwidth+0x1c1/0x2c0 [thunderbolt] tb_tunnel_consumed_bandwidth+0xfd/0x910 [thunderbolt] tb_available_bandwidth+0x5f2/0xeb0 [thunderbolt] tb_recalc_estimated_bandwidth+0x2a0/0x1bc0 [thunderbolt] tb_handle_dp_bandwidth_request+0x1897/0x5e20 [thunderbolt] proce",
    "evidence": "osv:CVE-2026-98694",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.273",
            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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          {
            "value": "6.12.113",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.18.56",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98694",
      "aliases": [
        "CVE-2026-98694"
      ],
      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "9594550e95bcc362027b7ad5f0d5665110f8a7d8"
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                {
                  "fixed": "0dc4296ac0910d3a43d9e105226ace463e475304"
                },
                {
                  "fixed": "b70b9c41f240c42bf6e728034537c0fe60c16ef4"
                },
                {
                  "fixed": "71b3c517e02af2c46ad58d4b3706b7c3cb24936d"
                },
                {
                  "fixed": "f18faa3d3b810d60a3005ae1b1d1866faa67d343"
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          }
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        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "4.13.0"
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                {
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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      ],
      "modified": "2026-11-01T02:30:24.770444375Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/08287212b622039212c972806f896f078dfd28e2",
        "https://git.kernel.org/stable/c/0dc4296ac0910d3a43d9e105226ace463e475304",
        "https://git.kernel.org/stable/c/71b3c517e02af2c46ad58d4b3706b7c3cb24936d",
        "https://git.kernel.org/stable/c/94358146389d985b809898cc23b1030ff240a25d",
        "https://git.kernel.org/stable/c/9594550e95bcc362027b7ad5f0d5665110f8a7d8",
        "https://git.kernel.org/stable/c/a02188ddc24b7872f0c5e0c5873f827318717803",
        "https://git.kernel.org/stable/c/b70b9c41f240c42bf6e728034537c0fe60c16ef4",
        "https://git.kernel.org/stable/c/f18faa3d3b810d60a3005ae1b1d1866faa67d343",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98694.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98694",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98694.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98694",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 508196,
  "published_at": "2026-10-18T15:46:18.654+00:00"
}