{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49863",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-49863"
  ],
  "published": "2024-10-21T18:02:47Z",
  "summary": "vhost/scsi: null-ptr-dereference in vhost_scsi_get_req()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost/scsi: null-ptr-dereference in vhost_scsi_get_req()\n\nSince commit 3f8ca2e115e5 (\"vhost/scsi: Extract common handling code\nfrom control queue handler\") a null pointer dereference bug can be\ntriggered when guest sends an SCSI AN request.\n\nIn vhost_scsi_ctl_handle_vq(), `vc.target` is assigned with\n`&v_req.tmf.lun[1]` within a switch-case block and is then passed to\nvhost_scsi_get_req() which extracts `vc->req` and `tpg`. However, for\na `VIRTIO_SCSI_T_AN_*` request, tpg is not required, so `vc.target` is\nset to NULL in this branch. Later, in vhost_scsi_get_req(),\n`vc->target` is dereferenced without being checked, leading to a null\npointer dereference bug. This bug can be triggered from guest.\n\nWhen this bug occurs, the vhost_worker process is killed while holding\n`vq->mutex` and the corresponding tpg will remain occupied\nindefinitely.\n\nBelow is the KASAN report:\nOops: general protection fault, probably for non-canonical address\n0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 1 PID: 840 Comm: poc Not tainted 6.10.0+ #1\nHardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS\n1.16.3-debian-1.16.3-2 04/01/2014\nRIP: 0010:vhost_scsi_get_req+0x165/0x3a0\nCode: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2b 02 00 00\n48 b8 00 00 00 00 00 fc ff df 4d 8b 65 30 4c 89 e2 48 c1 ea 03 <0f> b6\n04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 be 01 00 00\nRSP: 0018:ffff888017affb50 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: ffff88801b000000 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888017affcb8\nRBP: ffff888017affb80 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000\nR13: ffff888017affc88 R14: ffff888017affd1c R15: ffff888017993000\nFS:  000055556e076500(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00000000200027c0 CR3: 0000000010ed0004 CR4: 0000000000370ef0\nCall Trace:\n <TASK>\n ? show_regs+0x86/0xa0\n ? die_addr+0x4b/0xd0\n ? exc_general_protection+0x163/0x260\n ? asm_exc_general_protection+0x27/0x30\n ? vhost_scsi_get_req+0x165/0x3a0\n vhost_scsi_ctl_handle_vq+0x2a4/0xca0\n ? __pfx_vhost_scsi_ctl_handle_vq+0x10/0x10\n ? __switch_to+0x721/0xeb0\n ? __schedule+0xda5/0x5710\n ? __kasan_check_write+0x14/0x30\n ? _raw_spin_lock+0x82/0xf0\n vhost_scsi_ctl_handle_kick+0x52/0x90\n vhost_run_work_list+0x134/0x1b0\n vhost_task_fn+0x121/0x350\n...\n </TASK>\n---[ end trace 0000000000000000 ]---\n\nLet's add a check in vhost_scsi_get_req.\n\n[whitespace fixes]",
  "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": "6.1.113",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49863"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6592347f06e2b19a624270a85ad4b3ae48c3b241"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/46128370a72c431df733af5ebb065c4d48c9ad39"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ace9c778a214da9c98d7b69d904d1b0816f4f681"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/25613e6d9841a1f9fb985be90df921fa99f800de"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/00fb5b23e1c9cdbe496f5cd6b40367cb895f6c93"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/61517f33e76d2c5247c1e61e668693afe5b67e6f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/221af82f606d928ccef19a16d35633c63026f1be"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}