{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7b07a2a7ca02a20124b552be96c5a56910795488"
            },
            {
              "fixed": "be539138d9a187af3b884525a395db10797c64f1"
            },
            {
              "fixed": "5fd8baacc7dc477df9cac61b45491840247a9b1e"
            },
            {
              "fixed": "58952c83dfe6ea3294a74734d2d1018c1120779a"
            },
            {
              "fixed": "621707dc67c9846fd876d7579ec951d92aa033f1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93121.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths\n\nThe error paths for endpoint-disabled (ESHUTDOWN) and request-allocation\nfailure (ENOMEM) in ffs_dmabuf_transfer() jump to err_fence_put which\ncalls dma_fence_put() on the fence. However, at that point the fence has\nonly been kmalloc'd — dma_fence_init() has not been called yet, so the\nrefcount and the fence ops are uninitialized. Calling dma_fence_put() on\nsuch an object leads to undefined behavior.\n\nUse kfree() instead, since the fence is just a plain allocation at this\nstage, and rename the label to err_fence_free to reflect the actual\ncleanup action.",
  "id": "CVE-2026-93121",
  "modified": "2026-09-20T11:30:43.098867433Z",
  "published": "2026-09-17T16:11:27.220Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58952c83dfe6ea3294a74734d2d1018c1120779a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fd8baacc7dc477df9cac61b45491840247a9b1e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/621707dc67c9846fd876d7579ec951d92aa033f1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be539138d9a187af3b884525a395db10797c64f1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93121.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93121"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths"
}