{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-90218",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-90218"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "RDMA/cma: Fix WARNING in res_to_rt",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cma: Fix WARNING in res_to_rt\n\nsyzbot reported a WARN_ON(!res->dev) in res_to_rt() triggered via\naddr_handler() during asynchronous address resolution:\n\n\"\nWARNING: drivers/infiniband/core/restrack.c:138 at res_to_rt+0x1c4/0x230\nCPU#1: kworker/u8:4/59\nModules linked in:\nCPU: 1 UID: 0 PID: 59 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Compute Engine, BIOS Google 07/24/2026\nWorkqueue: ib_addr process_one_req\nRIP: 0010:res_to_rt+0x1c4/0x230 drivers/infiniband/core/restrack.c:138\nRSP: 0018:ffffc9000201f850 EFLAGS: 00010293\nRAX: ffffffff88d00ce5 RBX: ffff88807f0fd4f8 RCX: ffff88801e6e0000\nRDX: 0000000000000000 RSI: ffffffff8fd996f0 RDI: 0000000000000003\nRBP: 0000000000000000 R08: ffff88801e6e0000 R09: 000000000000000a\nR10: 0000000000000009 R11: 0000000000000000 R12: dffffc0000000000\nR13: 1ffff1100fe1fa9f R14: 0000000000000000 R15: 0000000000000003\nFS:  0000000000000000(0000) GS:ffff888125012000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00001d559c3d2000 CR3: 0000000077c4c000 CR4: 00000000003526f0\nCall Trace:\n <TASK>\n rdma_restrack_add+0x5a/0x8a0 drivers/infiniband/core/restrack.c:236\n addr_handler+0x41a/0x5a0 drivers/infiniband/core/cma.c:3534\n process_one_req+0x2eb/0x540 drivers/infiniband/core/addr.c:624\n process_one_work kernel/workqueue.c:3375 [inline]\n process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458\n worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539\n kthread+0x388/0x470 kernel/kthread.c:436\n ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245\n </TASK>\n\"\n\nIn addr_handler(), cma_acquire_dev_by_src_ip() is called to populate\nid_priv->cma_dev and bind the associated ib_device to id_priv->id.device.\nIf cma_acquire_dev_by_src_ip() returns an error (non-zero status), the ID\nremains unassociated with any RDMA device.\n\nPreviously, rdma_restrack_add(&id_priv->res) was invoked unconditionally\neven when cma_acquire_dev_by_src_ip() failed, passing a resource with a\nNULL dev pointer and triggering the WARN_ON assertion in res_to_rt().\n\nFix this by only adding the resource to restrack when acquiring the device\nsucceeds.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90218"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d7e55ea64dd15769318ba2e0fe0956db82ba3c3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/39e83bb77fc92344cd62a373b311f096d812e548"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9c80273d663959504957606b9a24fe901ee2a4a1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2a63cb9ea862ac7d947952b497eef6520853538c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f72957e0b31f2962f4c1089a9223f1206aa26983"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/544e40805dbb6cfe64916bd4c8b238fec585ac2a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/64a2bd4cfc16c24f0a0e6321a2fd00ffde3e0a5b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c6d1ec4fbe56492bb88987d577f04a5fb6955f26"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-17T16:10:40Z"
  }
}