{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "113580530ee7dc61e668b641d657920734533b9f"
            },
            {
              "fixed": "b39b08e6bee812514b449dc874076890e6b871a0"
            },
            {
              "fixed": "8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66"
            },
            {
              "fixed": "b4d961351aa84fdf0148783fb1f3a1391b8a0adb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68400.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation\n\nUse the descriptor's `ep_mem_offset` to calculate the start of the endpoint\nmemory access array and to comply with the FF-A spec instead of defaulting\nto `sizeof(struct ffa_mem_region)`.\nThis requires moving `ffa_mem_region_additional_setup()` earlier in the setup\nflow.\nAlso, add sanity checks to ensure the calculated descriptor offsets do not\nexceed `max_fragsize`.",
  "id": "CVE-2026-68400",
  "modified": "2026-08-14T03:52:04.045785272Z",
  "published": "2026-08-10T12:04:19.952Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ef18f0ab3c0ec1eac77289f5a542bd96a8a6d66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b39b08e6bee812514b449dc874076890e6b871a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4d961351aa84fdf0148783fb1f3a1391b8a0adb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68400.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68400"
    },
    {
      "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": "firmware: arm_ffa: Fix Endpoint Memory Access Descriptor offset calculation"
}