{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-97989",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-97989"
  ],
  "published": "2026-09-25T10:24:31Z",
  "summary": "vduse: validate virtqueue alignment",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: validate virtqueue alignment\n\nvduse_validate_config() only checks the upper bound of vq_align. Invalid\nvalues can therefore reach vring_create_virtqueue_map(). The split-ring\nhelpers use align - 1 as a bit mask, so the alignment must be a non-zero\npower of two. A zero value makes vring_size() drop the descriptor and\navailable-ring part and vring_init() leave the used ring pointer NULL.\n\nThe VIRTIO spec requires the used ring to start at an address\naligned to at least 4 bytes. Reject values below VRING_USED_ALIGN_SIZE as\nwell as non-power-of-two values before they reach the virtio ring helpers.\n\nOpening a virtio-net device created with vq_align=0 triggered:\n\nBUG: KASAN: null-ptr-deref in virtqueue_kick_prepare_split+0xe3/0x100\nRead of size 2 at addr 0000000000000000 by task systemd-network/1062\n\nCall Trace (relevant frames):\n dump_stack_lvl\n print_report\n kasan_report\n __asan_load2\n virtqueue_kick_prepare_split+0xe3/0x100\n virtqueue_kick_prepare+0x40/0x60\n try_fill_recv+0x857/0x1250\n virtnet_open+0x189/0x460\n __dev_open+0x225/0x390\n __dev_change_flags+0x368/0x3b0\n netif_change_flags+0x56/0xc0\n do_setlink.isra.0+0x68c/0x1e30\n\nValidate the value before it reaches the virtio ring helpers.",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-97989"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c3c3b0839a1197530cc18f535062fc84dbdfc885"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fa2c25b4add57888acfa89e398389e267bff3dcf"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-25T10:24:31Z"
  }
}