{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  vduse: validate virtqueue alignment  vduse_validate_config() only checks the upper bound of vq_align. Invalid values can therefore reach vring_create_virtqueue_map(). The split-ring helpers use align - 1 as a bit mask, so the alignment must be a non-zero power of two. A zero value makes vring_size() drop the descriptor and available-ring part and vring_init() leave the used ring pointer NULL.  The VIRTIO spec requires the used ring to start at an address aligned to at least 4 bytes. Reject values below VRING_USED_ALIGN_SIZE as well as non-power-of-two values before they reach the virtio ring helpers.  Opening a virtio-net device created with vq_align=0 triggered:  BUG: KASAN: null-ptr-deref in virtqueue_kick_prepare_split+0xe3/0x100 Read of size 2 at addr 0000000000000000 by task systemd-network/1062  Call Trace (relevant frames):  dump_stack_lvl  print_report  kasan_report  __asan_load2  virtqueue_kick_prepare_split+0xe3/0x100  virtqueue_kick_prepare+0x40/0x60  try_fill_recv+0x857/0x1250  virtnet_open+0x189/0x460  __dev_open+0x225/0x390  __dev_change_flags+0x368/0x3b0  netif_change_flags+0x56/0xc0  do_setlink.isra.0+0x68c/0x1e30  Validate the value before it reaches the virtio ring helpers.",
  "id": "DEBIAN-CVE-2026-97989",
  "modified": "2026-09-26T04:47:32.359915994Z",
  "published": "2026-09-25T11:17:27.010Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-97989"
    }
  ],
  "upstream": [
    "CVE-2026-97989"
  ]
}