{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e40f5a6bf88a781d5f81bc6b8aab9ac31d8c98dd"
            },
            {
              "fixed": "945816e63c8677cf4bfde963a0774432ce8afc85"
            },
            {
              "fixed": "6bd96e40f31dde8f8cd79772b4df0f171cf8a915"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63864.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Propagate error from visit_tailcall_insn\n\nCommit e40f5a6bf88a (\"bpf: correct stack liveness for tail calls\") added\nvisit_tailcall_insn() but did not check its return value.",
  "id": "CVE-2026-63864",
  "modified": "2026-07-22T05:30:05.358457256Z",
  "published": "2026-07-19T14:04:50.605Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bd96e40f31dde8f8cd79772b4df0f171cf8a915"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/945816e63c8677cf4bfde963a0774432ce8afc85"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63864.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63864"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "bpf: Propagate error from visit_tailcall_insn"
}