{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-44948",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-08-21T05:34:56.665Z",
        "datePublished": "2024-09-04T18:35:48.980Z",
        "dateUpdated": "2024-09-15T17:55:46.397Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-09-15T17:55:46.397Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mtrr: Check if fixed MTRRs exist before saving them\n\nMTRRs have an obsolete fixed variant for fine grained caching control\nof the 640K-1MB region that uses separate MSRs. This fixed variant has\na separate capability bit in the MTRR capability MSR.\n\nSo far all x86 CPUs which support MTRR have this separate bit set, so it\nwent unnoticed that mtrr_save_state() does not check the capability bit\nbefore accessing the fixed MTRR MSRs.\n\nThough on a CPU that does not support the fixed MTRR capability this\nresults in a #GP.  The #GP itself is harmless because the RDMSR fault is\nhandled gracefully, but results in a WARN_ON().\n\nAdd the missing capability check to prevent this."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/kernel/cpu/mtrr/mtrr.c"
                    ],
                    "versions": [
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "34f36e6ee5bd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "06c1de44d378",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "450b6b22acda",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "ca7d00c5656d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "8aa79dfb216b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "8a90d3fc7c24",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "388f1c954019",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "2b1f6278d77c",
                            "lessThan": "919f18f961c0",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/kernel/cpu/mtrr/mtrr.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.22",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.22",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "4.19.320",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.4.282",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.10.224",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.15.165",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.1.105",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.6.46",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.10.5",
                            "lessThanOrEqual": "6.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.11",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/34f36e6ee5bd7eff8b2adcd9fcaef369f752d82e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/06c1de44d378ec5439db17bf476507d68589bfe9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/450b6b22acdaac67a18eaf5ed498421ffcf10051"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ca7d00c5656d1791e28369919e3e10febe9c3b16"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8aa79dfb216b865e96ff890bc4ea71650f9bc8d7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8a90d3fc7c24608548d3a750671f9dac21d1a462"
                },
                {
                    "url": "https://git.kernel.org/stable/c/388f1c954019f253a8383f7eb733f38d541e10b6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/919f18f961c03d6694aa726c514184f2311a4614"
                }
            ],
            "title": "x86/mtrr: Check if fixed MTRRs exist before saving them",
            "x_generator": {
                "engine": "bippy-c9c4e1df01b2"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2024-44948",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2024-09-10T17:40:29.464386Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2024-09-12T17:33:37.443Z"
                }
            }
        ]
    }
}