{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5908f3ed6dc209e5c824e63afda7545805f75a7e"
            },
            {
              "fixed": "3f02031a0a53de0d3ef066c92d0486b2b11be40c"
            },
            {
              "fixed": "329ea475581c647a680a6937e353c1a6e2534b40"
            },
            {
              "fixed": "4bf6bac375076ced2fa4b3fef8739bd985f93456"
            }
          ],
          "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": "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-2026-93079.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/features: Reject Get Feature count larger than the output buffer\n\ncxlctl_get_feature() sizes its output buffer from the user's\nfwctl_rpc.out_len, but the device is told to write\ncxl_mbox_get_feat_in.count bytes into rpc_out-\u003epayload, which is a\nseparate user-controlled value. Nothing bounds count against out_len, so\na small out_len with a large count overflows the kvzalloc()'d buffer.\nA heap OOB write reachable from FWCTL_RPC.\n\nReject requests where count exceeds the available payload room, before\nallocating.",
  "id": "CVE-2026-93079",
  "modified": "2026-09-20T11:30:18.677875892Z",
  "published": "2026-09-17T16:11:00.350Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/329ea475581c647a680a6937e353c1a6e2534b40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f02031a0a53de0d3ef066c92d0486b2b11be40c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bf6bac375076ced2fa4b3fef8739bd985f93456"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93079.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93079"
    },
    {
      "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:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "cxl/features: Reject Get Feature count larger than the output buffer"
}