{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5e5ac21f629de796ab5d598b59c5e468c6fe4f95"
            },
            {
              "fixed": "7682b617db1f19bc606b5f1badadcf1e63a87b14"
            },
            {
              "fixed": "77b814c1832fde018c30357b4ec3fcdaa91a1c10"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "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-2026-93096.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/features: Serialize multi-part Get/Set Feature transfers\n\nA Get or Set Feature payload larger than the mailbox payload size is\nsplit into several mailbox commands. mbox_mutex only serializes\nindividual mailbox commands and is dropped between iterations of these\nloops. Nothing serializes the multi-part transfer as a whole.\ncxl_get_feature() and cxl_set_feature() are reachable concurrently\nfrom fwctl (per-fd RPCs run under a read-held registration lock) and\nfrom the EDAC scrub/ECS/repair paths, so two transfers to the same\nmailbox can interleave their parts and corrupt the device's transfer\ncontext.\n\nAdd a per-mailbox feat_mutex and hold it across the whole transfer in\nboth functions. It nests outside mbox_mutex (which is taken inside\ncxl_internal_send_cmd()), and is taken nowhere else, so no lock-ordering\ninversion is introduced.",
  "id": "CVE-2026-93096",
  "modified": "2026-09-19T03:31:01.073408751Z",
  "published": "2026-09-17T16:11:10.359Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7682b617db1f19bc606b5f1badadcf1e63a87b14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77b814c1832fde018c30357b4ec3fcdaa91a1c10"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93096.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93096"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "cxl/features: Serialize multi-part Get/Set Feature transfers"
}