{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64042", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.029Z", "datePublished": "2026-07-19T15:39:28.604Z", "dateUpdated": "2026-07-20T13:42:43.720Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:42:43.720Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Check BAR resources before exporting a DMABUF\n\nA DMABUF exports access to BAR resources and, although they are\nrequested at startup time, we need to ensure they really were reserved\nbefore exporting. Otherwise, it's possible to access unreserved\nresources through the export.\n\nAdd a check to the DMABUF-creation path."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/vfio/pci/vfio_pci_dmabuf.c"], "versions": [{"version": "5d74781ebc86c5fa9e9d6934024c505412de9b52", "lessThan": "8443cd4497a4498c4b01058d76a92116244cb605", "status": "affected", "versionType": "git"}, {"version": "5d74781ebc86c5fa9e9d6934024c505412de9b52", "lessThan": "702809dabdecca807bdd50cfdcc1c980feb2ba62", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/vfio/pci/vfio_pci_dmabuf.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8443cd4497a4498c4b01058d76a92116244cb605"}, {"url": "https://git.kernel.org/stable/c/702809dabdecca807bdd50cfdcc1c980feb2ba62"}], "title": "vfio/pci: Check BAR resources before exporting a DMABUF", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"bugzilla": {"description": "kernel: vfio/pci: Check BAR resources before exporting a DMABUF", "id": "2502547", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502547"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1220", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nvfio/pci: Check BAR resources before exporting a DMABUF\nA DMABUF exports access to BAR resources and, although they are\nrequested at startup time, we need to ensure they really were reserved\nbefore exporting. Otherwise, it's possible to access unreserved\nresources through the export.\nAdd a check to the DMABUF-creation path.", "A flaw was found in the Linux kernel's vfio/pci subsystem. This vulnerability occurs because the Direct Memory Access Buffer (DMABUF) export mechanism does not adequately verify if Base Address Register (BAR) resources are properly reserved before allowing access. A local attacker could exploit this by exporting a DMABUF, potentially gaining unauthorized access to unreserved system resources. This could lead to information disclosure or other unintended system behavior."], "name": "CVE-2026-64042", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64042\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64042\nhttps://lore.kernel.org/linux-cve-announce/2026071906-CVE-2026-64042-c30f@gregkh/T"], "threat_severity": "Important"}