{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright © Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34971.json"
      }
    ],
    "title": "wasmtime: cranelift: Wasmtime: Sandbox escape due to miscompiled heap access on aarch64",
    "tracking": {
      "current_release_date": "2026-06-28T07:31:26+00:00",
      "generator": {
        "date": "2026-06-28T07:31:26+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.2.6"
        }
      },
      "id": "CVE-2026-34971",
      "initial_release_date": "2026-04-09T18:45:44.819000+00:00",
      "revision_history": [
        {
          "date": "2026-04-09T18:45:44.819000+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-04-09T23:13:42.169435+00:00",
          "number": "2",
          "summary": "Current version"
        },
        {
          "date": "2026-06-28T07:31:26+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Connectivity Link 1",
                "product": {
                  "name": "Red Hat Connectivity Link 1",
                  "product_id": "red_hat_connectivity_link_1",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:connectivity_link:1"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Connectivity Link 1"
          },
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux 10",
                "product": {
                  "name": "Red Hat Enterprise Linux 10",
                  "product_id": "red_hat_enterprise_linux_10",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:10"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux 10"
          },
          {
            "category": "product_version",
            "name": "redhat-user-workloads/rhcl-1-3-wasm-shim",
            "product": {
              "name": "redhat-user-workloads/rhcl-1-3-wasm-shim",
              "product_id": "redhat-user-workloads/rhcl-1-3-wasm-shim",
              "product_identification_helper": {
                "purl": "pkg:oci/rhcl-1-3-wasm-shim?repository_url=quay.io/redhat-user-workloads/api-management-tenant/rhcl-1-3-wasm-shim"
              }
            }
          },
          {
            "category": "product_version",
            "name": "virt-firmware-rs.src",
            "product": {
              "name": "virt-firmware-rs.src",
              "product_id": "virt-firmware-rs.src",
              "product_identification_helper": {
                "purl": "pkg:rpm/redhat/virt-firmware-rs?arch=src"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "redhat-user-workloads/rhcl-1-3-wasm-shim as a component of Red Hat Connectivity Link 1",
          "product_id": "red_hat_connectivity_link_1:redhat-user-workloads/rhcl-1-3-wasm-shim"
        },
        "product_reference": "redhat-user-workloads/rhcl-1-3-wasm-shim",
        "relates_to_product_reference": "red_hat_connectivity_link_1"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "virt-firmware-rs.src as a component of Red Hat Enterprise Linux 10",
          "product_id": "red_hat_enterprise_linux_10:virt-firmware-rs.src"
        },
        "product_reference": "virt-firmware-rs.src",
        "relates_to_product_reference": "red_hat_enterprise_linux_10"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-34971",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2026-04-09T19:02:26.575965+00:00",
      "flags": [
        {
          "label": "component_not_present",
          "product_ids": [
            "red_hat_enterprise_linux_10:virt-firmware-rs.src"
          ]
        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2457008"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Wasmtime, a runtime for WebAssembly. On aarch64 systems, a miscompilation bug in Wasmtime's Cranelift backend can be exploited by a guest WebAssembly module. This vulnerability allows the module to bypass memory bounds checks, enabling arbitrary read and write operations on the host system's memory. This ultimately leads to a sandbox escape, where the guest module can access resources beyond its intended isolated environment.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "wasmtime: cranelift: Wasmtime: Sandbox escape due to miscompiled heap access on aarch64",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The requirement that Spectre mitigations be disabled is a non-default state for Red Hat products and is highly discouraged. No Red Hat product in its default configuration is vulnerable to this flaw.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "known_affected": [
          "red_hat_connectivity_link_1:redhat-user-workloads/rhcl-1-3-wasm-shim"
        ],
        "known_not_affected": [
          "red_hat_enterprise_linux_10:virt-firmware-rs.src"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-34971"
        },
        {
          "category": "external",
          "summary": "RHBZ#2457008",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457008"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-34971",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-34971"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-34971",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34971"
        },
        {
          "category": "external",
          "summary": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jhxm-h53p-jm7w",
          "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-jhxm-h53p-jm7w"
        }
      ],
      "release_date": "2026-04-09T18:45:44.819000+00:00",
      "remediations": [
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
            "red_hat_connectivity_link_1:redhat-user-workloads/rhcl-1-3-wasm-shim"
          ]
        },
        {
          "category": "none_available",
          "details": "Affected",
          "product_ids": [
            "red_hat_connectivity_link_1:redhat-user-workloads/rhcl-1-3-wasm-shim"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "red_hat_connectivity_link_1:redhat-user-workloads/rhcl-1-3-wasm-shim",
            "red_hat_enterprise_linux_10:virt-firmware-rs.src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important",
          "product_ids": [
            "red_hat_connectivity_link_1:redhat-user-workloads/rhcl-1-3-wasm-shim",
            "red_hat_enterprise_linux_10:virt-firmware-rs.src"
          ]
        }
      ],
      "title": "wasmtime: cranelift: Wasmtime: Sandbox escape due to miscompiled heap access on aarch64"
    }
  ]
}