{
  "cveId": "CVE-2026-93121",
  "url": "https://patchblox.com/security/cve/CVE-2026-93121",
  "summary": "CVE-2026-93121 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-93121, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths  The error paths for endpoint-disabled (ESHUTDOWN) and request-allocation failure (ENOMEM) in ffs_dmabuf_transfer() jump to err_fence_put which calls dma_fence_put() on the fence. However, at that point the fence has only been kmalloc\u0027d \u2014 dma_fence_init() has not been called yet, so the refcount and the fence ops are uninitialized. Calling dma_fence_put() on such an object leads to undefined behavior.  Use kfree() instead, since the fence is just a plain allocation at this stage, and rename the label to err_fence_free to reflect the actual cleanup action.",
  "published": "2026-09-17T17:18:06Z",
  "severity": "high",
  "cvss": 7,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00155,
  "epssPercentile": 0.04647,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93121",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-93121",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93121",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-93121",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93121",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-93121",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93121",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}