{"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/kernel/cpu/amd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4c6b56a76478bd1ab609827c571905386c11d308", "status": "affected", "version": "36ff93e66d0efc46e39fab536a9feec968daa766", "versionType": "git"}, {"lessThan": "f1fdffe0afea02ba783acfe815b6a60e7180df40", "status": "affected", "version": "607b9fb2ce248cc5b633c5949e0153838992c152", "versionType": "git"}, {"status": "affected", "version": "e980de2ff109dacb6d9d3a77f01b27c467115ecb", "versionType": "git"}, {"lessThan": "6.13", "status": "affected", "version": "6.12.58", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/kernel/cpu/amd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux"}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2025-68195", "lastModified": "2026-07-30T06:24:33.117", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2025-12-16T14:15:52.263", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c6b56a76478bd1ab609827c571905386c11d308"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f1fdffe0afea02ba783acfe815b6a60e7180df40"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: x86/CPU/AMD: Add missing terminator for zen5_rdseed_microcode", "id": "2422687", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422687"}, "csaw": false, "details": ["No description is available for this CVE."], "name": "CVE-2025-68195", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "2025-12-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68195\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68195\nhttps://lore.kernel.org/linux-cve-announce/2025121636-CVE-2025-68195-98fc@gregkh/T"]}

{}