Bluetooth: L2CAP: Fix uaf in l2cap_connect

{
  "id": "b68ae8d009788471e831f00e53040837e16c3afd27032e52a6719efed422c8a9",
  "url": "https://osv.dev/vulnerability/CVE-2024-49950",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: L2CAP: Fix uaf in l2cap_connect",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix uaf in l2cap_connect [Syzbot reported] BUG: KASAN: slab-use-after-free in l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 Read of size 8 at addr ffff8880241e9800 by task kworker/u9:0/54 CPU: 0 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-00268-g788220eee30d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci2 hci_rx_work Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 l2cap_connect.constprop.0+0x10d8/0x1270 net/bluetooth/l2cap_core.c:3949 l2cap_connect_req net/bluetooth/l2cap_core.c:4080 [inline] l2cap_bredr_sig_cmd net/bluetooth/l2cap_core.c:4772 [inline] l2cap_sig_channel net/bluetooth/l2cap_core.c:5543 [inline] l2cap_recv_frame+0xf0b/0x8eb0 net/bluetooth/l2cap_core.c:6825 l2cap_recv_acldata+0x9b4/0xb70 net/bluetooth/l2cap_core.c:7514 hci_acldata_packet net/bluetooth/hci_core.c:3791 [inline] hci_rx_work+0xaab/0x1610 net/bluetooth/hci_core.c:4028 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/pro",
    "evidence": "osv:CVE-2024-49950",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.174",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.118",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-49950",
      "aliases": [
        "CVE-2024-49950"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
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                  "fixed": "b22346eec479a30bfa4a02ad2c551b54809694d0"
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                  "fixed": "b90907696c30172b809aa3dd2f0caffae761e4c6"
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                {
                  "fixed": "78d30ce16fdf9c301bcd8b83ce613cea079cea83"
                },
                {
                  "fixed": "a1c6174e23df10b8e5770e82d63bc6e2118a3dc7"
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                {
                  "fixed": "333b4fd11e89b29c84c269123f871883a30be586"
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              ]
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-49950.json"
          }
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        {
          "ranges": [
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              "type": "ECOSYSTEM",
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            {
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              "events": [
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                  "introduced": "6.2.0"
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                {
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            },
            {
              "type": "ECOSYSTEM",
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-49950.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.830830873Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/333b4fd11e89b29c84c269123f871883a30be586",
        "https://git.kernel.org/stable/c/686e05c9dbd68766c6bda5f31f7e077f36a7fb29",
        "https://git.kernel.org/stable/c/78d30ce16fdf9c301bcd8b83ce613cea079cea83",
        "https://git.kernel.org/stable/c/a1c6174e23df10b8e5770e82d63bc6e2118a3dc7",
        "https://git.kernel.org/stable/c/b22346eec479a30bfa4a02ad2c551b54809694d0",
        "https://git.kernel.org/stable/c/b90907696c30172b809aa3dd2f0caffae761e4c6",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/49xxx/CVE-2024-49950.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-49950",
        "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/2024/49xxx/CVE-2024-49950.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-49950",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513544,
  "published_at": "2024-10-21T18:02:06.387+00:00"
}