{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-68176",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-30T09:28:09.372Z",
        "datePublished": "2026-08-10T11:59:47.298Z",
        "dateUpdated": "2026-08-19T16:30:41.982Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-19T16:30:41.982Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix mmiotrace possible NULL dereferencing of hiter->dev\n\nIf the mmio_pipe_open() fails to find a PCI device, the hiter->dev\nwill be assigned to NULL. The mmiotrace read() function dereferences the\nhiter->dev if hiter exists.\n\nChange the test of the read to not only check hiter being NULL, but also\nthe hiter->dev before dereferencing it."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/trace/trace_mmiotrace.c"
                    ],
                    "versions": [
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "c06470320f8156306986a831010cdc9f9f87cb50",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "0d5aaf91a3d05f7f993401af27872a5fc0f26edc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "3635a9e8b453e658a49b39d025f35bbc6e58d0e2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "faaf95135184208ee3ac6f33175c8d1800669dfc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "201a01102c529772168181190cb084471082cf5c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "8464427e1c177809a9488a97dfa2807d9dcf323b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "724cd84b0546c07806840fa658714488553d13a2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
                            "lessThan": "144f29e85702234b23d2a62abf723e6a17eb5427",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/trace/trace_mmiotrace.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.27",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.27",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.148",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.101",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.42",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.6",
                            "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": "2.6.27",
                                    "versionEndExcluding": "5.10.265"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "5.15.216"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "6.6.148"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "6.12.101"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "6.18.42"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "7.1.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"
                }
            ],
            "title": "tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}