{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3e1c6f35409f9e447bf37f64840f5b65576bfb78"
            },
            {
              "fixed": "e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a"
            },
            {
              "fixed": "cd12d3e08620257fbcaa262785d7f4b9473afc7a"
            },
            {
              "fixed": "86a0e945fb645ea90233fde239cd2de79f01974c"
            },
            {
              "fixed": "a11212910cf09b2fe8db9afa41ef60c4f81879c5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.10.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98611.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check params size before reading reserved fields\n\nbpf_crypto_ctx_create() is a kfunc whose second argument is declared\nwith the __sz annotation, so the verifier only guarantees that\nparams__sz bytes of params are valid.  The function nevertheless reads\nparams-\u003ereserved[0] and params-\u003ereserved[1] (offsets 14 and 15) before\ncomparing params__sz against the size of struct bpf_crypto_params, so a\nBPF program can pass a shorter buffer and have the kernel read past the\nregion that was validated for it.\n\nMove the size check in front of the reserved field reads.",
  "id": "CVE-2026-98611",
  "modified": "2026-10-20T02:31:09.410216240Z",
  "published": "2026-10-18T15:19:26.922Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86a0e945fb645ea90233fde239cd2de79f01974c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a11212910cf09b2fe8db9afa41ef60c4f81879c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd12d3e08620257fbcaa262785d7f4b9473afc7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e03253f5d65ebcd2a6d479f140c3bd9c7e4fb84a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98611.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98611"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf: Check params size before reading reserved fields"
}