{
  "cveId": "CVE-2026-74702",
  "url": "https://patchblox.com/security/cve/CVE-2026-74702",
  "summary": "CVE-2026-74702 is fixed in linux on 1 platform by DEBIAN-CVE-2026-74702 (version 7.1.9-1), released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  vhost-scsi: reject feature changes after endpoin...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  vhost-scsi: reject feature changes after endpoint  vhost_scsi_setup_vq_cmds() runs from VHOST_SCSI_SET_ENDPOINT and allocates each command\u0027s protection scatterlist array (prot_sgl) according to the acknowledged VIRTIO_SCSI_F_T10_PI bit.  The command pools are not rebuilt when VHOST_SET_FEATURES changes that bit later.  Although virtio feature bits must not change after feature negotiation, vhost_scsi_set_features() currently accepts such a request after the endpoint is active and updates acked_features.  Enabling T10-PI after endpoint setup therefore leaves prot_sgl NULL while the I/O path follows the new feature bit.  For a 129-page protection payload, vhost_scsi_mapal() passes the missing first chunk to sg_alloc_table_chained():    sg_alloc_table_chained(table, 129, first_chunk=NULL,                          nents_first_chunk=inline_sg_cnt)  sg_pool_index() then hits:    BUG_ON(nents \u003E SG_CHUNK_SIZE);   /* 129 \u003E 128 */  The kernel reported the following call trace and register state:    Call Trace:    \u003CTASK\u003E    ? __sg_alloc_table\u002B0x1d8/0x250    ? __pfx_vhost_run_work_list\u002B0x10/0x10 [vhost]    sg_alloc_table_chained\u002B0x59/0xf0    ? __pfx_sg_pool_alloc\u002B0x10/0x10    ? vhost_scsi_calc_sgls.constprop.0\u002B0x43/0x60 [vhost_scsi]    vhost_scsi_handle_vq\u002B0xf02/0x1700 [vhost_scsi]    ? __pfx_vhost_scsi_handle_vq\u002B0x10/0x10 [vhost_scsi]    vhost_scsi_handle_kick\u002B0x37/0x50 [vhost_scsi]    vhost_run_work_list\u002B0x8e/0xd0 [vhost]    vhost_task_fn\u002B0xe1/0x210    ret_from_fork\u002B0x348/0x540    \u003C/TASK\u003E    RIP: 0010:0x4   CR2 = 0x4   RSP: 0018:ffffc90000dbf940 EFLAGS: 00010202   RAX: ffffffff82396810 RBX: ffff88811dc28b80 RCX: 0000000000000000   RDX: 0000000000000000 RSI: 0000000000000820 RDI: 0000000000000081  VHOST_F_LOG_ALL is a vhost-specific runtime feature and remains the only exception.  Reject changes to any feature other than VHOST_F_LOG_ALL while the endpoint is active.  This preserves the existing runtime log toggle while preventing feature-dependent command resources and data-path state from becoming inconsistent.  Userspace must clear the endpoint before changing any other negotiated feature and set the endpoint up again afterward.",
  "published": "2026-08-22T16:16:44Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00127,
  "epssPercentile": 0.02412,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.9-1",
      "fix": "DEBIAN-CVE-2026-74702",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-74702",
      "released": "2026-09-04T01:46:23Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}