{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64254",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.773Z",
        "datePublished": "2026-07-24T15:31:22.293Z",
        "dateUpdated": "2026-08-17T04:52:06.227Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:52:06.227Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR\n\nWhen BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown\npath ends up calling pci_iounmap() on the same iomem with some offset,\nwhich is unnecessary and triggers a kernel warning like the following:\n\n  Trying to vunmap() nonexistent vm area (0000000069a5ffe8)\n  WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937\n  [...]\n  Call trace:\n   vunmap+0x58/0x68 (P)\n   iounmap+0x34/0x48\n   pci_iounmap+0x2c/0x40\n   ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf]\n   pci_device_remove+0x48/0xf8\n   device_remove+0x50/0x88\n   device_release_driver_internal+0x1c8/0x228\n   driver_detach+0x50/0xb0\n   bus_remove_driver+0x74/0x100\n   driver_unregister+0x34/0x68\n   pci_unregister_driver+0x34/0xa0\n   ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf]\n  [...]\n\nFix it by unmapping only when PEER_SPAD and CONFIG use difference bars."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/ntb/hw/epf/ntb_hw_epf.c"
                    ],
                    "versions": [
                        {
                            "version": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4",
                            "lessThan": "eb47b9bffd07a47b84910847cb5ea066ce184055",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4",
                            "lessThan": "06f6dd2ff2bd07eaf7178a807407ff27e85122b4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4",
                            "lessThan": "a4be4a1308f02bff79a30eea2d04ead5b63685f2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4",
                            "lessThan": "81371dbd23601f67f01372817fdbab42c5601e43",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4",
                            "lessThan": "9764a786ba98db58f0725913c369e721253aba33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e75d5ae8ab88b7ffb3d1d56124b003f3555f74b4",
                            "lessThan": "d876153680e3d721d385e554def919bce3d18c74",
                            "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/ntb/hw/epf/ntb_hw_epf.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.177",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.144",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.95",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.38",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.3",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.0",
                                    "versionEndExcluding": "6.1.177"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.6.144"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.12.95"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.18.38"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "7.1.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/eb47b9bffd07a47b84910847cb5ea066ce184055"
                },
                {
                    "url": "https://git.kernel.org/stable/c/06f6dd2ff2bd07eaf7178a807407ff27e85122b4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a4be4a1308f02bff79a30eea2d04ead5b63685f2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/81371dbd23601f67f01372817fdbab42c5601e43"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9764a786ba98db58f0725913c369e721253aba33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d876153680e3d721d385e554def919bce3d18c74"
                }
            ],
            "title": "NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR",
            "x_generator": {
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}