{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68195",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-16T13:41:40.253Z",
        "datePublished": "2025-12-16T13:43:21.855Z",
        "dateUpdated": "2026-08-05T12:10:10.646Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:10:10.646Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/CPU/AMD: Add missing terminator for zen5_rdseed_microcode\n\nRunning x86_match_min_microcode_rev() on a Zen5 CPU trips up KASAN for an out\nof bounds access."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable lookup is reached through local CPU boot or secondary-CPU bring-up; no network packets or remotely supplied data reach this path.\nAC:L - On an affected Zen5 CPU not matched by the two valid entries, the table scan deterministically crosses the array boundary without requiring a race, timing window, or other attacker-independent condition.\nPR:L - The lookup contains no capability or authentication check and executes automatically during CPU initialization; conservatively, a basic local foothold is sufficient rather than init-namespace root.\nUI:N - The invalid lookup occurs during CPU initialization without requiring a victim to open a file, mount media, or perform another action.\nS:U - The impact remains within the affected kernel and host; this is not a guest-to-host escape or another security-authority boundary crossing.\nC:H - The missing sentinel permits a source-unbounded read into adjacent kernel memory; the closest prior AMD missing-terminator case was likewise classified as CWE-125 with C:H ([CVE-2024-56721](https://nvd.nist.gov/vuln/detail/CVE-2024-56721)).\nI:N - The overrun is read-only: no out-of-bounds-derived value becomes a write address or control-flow target, and AMD separately tracks the underlying RDSEED entropy defect as CVE-2025-62626 ([AMD-SB-7055](https://www.amd.com/en/resources/product-security/bul letin/amd-sb-7055.html)).\nA:H - KASAN detects the invalid access, and panic_on_warn or kasan.fault=panic converts the report into a kernel panic during boot or CPU bring-up, making the system unavailable."
                        }
                    ]
                }
            ],
            "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/amd.c"
                    ],
                    "versions": [
                        {
                            "version": "36ff93e66d0efc46e39fab536a9feec968daa766",
                            "lessThan": "4c6b56a76478bd1ab609827c571905386c11d308",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "607b9fb2ce248cc5b633c5949e0153838992c152",
                            "lessThan": "f1fdffe0afea02ba783acfe815b6a60e7180df40",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e980de2ff109dacb6d9d3a77f01b27c467115ecb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.12.58",
                            "lessThan": "6.13",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/kernel/cpu/amd.c"
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.58"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4c6b56a76478bd1ab609827c571905386c11d308"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f1fdffe0afea02ba783acfe815b6a60e7180df40"
                }
            ],
            "title": "x86/CPU/AMD: Add missing terminator for zen5_rdseed_microcode",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}