{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "cd1a677cad994021b19665ed476aea63f5d54f31"
            },
            {
              "fixed": "76ccf21a12c5f6d6790bc32c7da82446d877b2f4"
            },
            {
              "fixed": "75582aaa580c11aed4c7731cad6b068b700e7efb"
            },
            {
              "fixed": "50156622eb0888e62541d715a98584480a1bc7cb"
            },
            {
              "fixed": "dbd857a9e1e33ea71eaf3e211877027e533770d1"
            },
            {
              "fixed": "69fe5af33fa3806f398d21c081d73c66e5523bc2"
            },
            {
              "fixed": "035867ae6f18df0aeedb2a57a5b74091bd4e3fe8"
            },
            {
              "fixed": "69fb5d91bba44ecf7eb80530b85fa4fb028921d5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43406.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: prevent potential out-of-bounds reads in process_message_header()\n\nIf the message frame is (maliciously) corrupted in a way that the\nlength of the control segment ends up being less than the size of the\nmessage header or a different frame is made to look like a message\nframe, out-of-bounds reads may ensue in process_message_header().\n\nPerform an explicit bounds check before decoding the message header.",
  "id": "CVE-2026-43406",
  "modified": "2026-07-08T05:37:28.058896376Z",
  "published": "2026-05-08T14:21:46.246Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/035867ae6f18df0aeedb2a57a5b74091bd4e3fe8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50156622eb0888e62541d715a98584480a1bc7cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/69fb5d91bba44ecf7eb80530b85fa4fb028921d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/69fe5af33fa3806f398d21c081d73c66e5523bc2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75582aaa580c11aed4c7731cad6b068b700e7efb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76ccf21a12c5f6d6790bc32c7da82446d877b2f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbd857a9e1e33ea71eaf3e211877027e533770d1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43406.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43406"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "libceph: prevent potential out-of-bounds reads in process_message_header()"
}