{
  "cveId": "CVE-2026-97989",
  "url": "https://patchblox.com/security/cve/CVE-2026-97989",
  "summary": "CVE-2026-97989 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-97989, released October 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "vduse: validate virtqueue alignment",
  "description": "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\u002B0xe3/0x100 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\u002B0xe3/0x100  virtqueue_kick_prepare\u002B0x40/0x60  try_fill_recv\u002B0x857/0x1250  virtnet_open\u002B0x189/0x460  __dev_open\u002B0x225/0x390  __dev_change_flags\u002B0x368/0x3b0  netif_change_flags\u002B0x56/0xc0  do_setlink.isra.0\u002B0x68c/0x1e30  Validate the value before it reaches the virtio ring helpers.",
  "published": "2026-09-25T11:17:27Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00168,
  "epssPercentile": 0.06183,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97989",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-97989",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97989",
      "released": "2026-10-02T21:04:56Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.7-1",
      "fix": "DEBIAN-CVE-2026-97989",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97989",
      "released": "2026-10-02T21:04:56Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}