{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-5745", "assignerOrgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18", "state": "PUBLISHED", "assignerShortName": "glibc", "dateReserved": "2025-06-05T19:15:09.234Z", "datePublished": "2025-06-05T19:20:23.405Z", "dateUpdated": "2025-06-05T20:13:51.068Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "3ff69d7a-14f2-4f67-a097-88dee7810d18", "shortName": "glibc", "dateUpdated": "2025-06-05T19:20:57.253Z"}, "datePublic": "2025-06-05T02:03:00.000Z", "affected": [{"vendor": "The GNU C Library", "product": "glibc", "platforms": ["Power10"], "versions": [{"status": "affected", "version": "2.40", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program."}]}], "references": [{"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33060"}], "workarounds": [{"lang": "en", "value": "One may disable the Power10 optimized string routines in glibc to work around this issue, by setting the glibc.cpu.hwcaps tunable. This can be done by exporting the GLIBC_TUNABLES environment variable like so:\n\n\n\n\nexport GLIBC_TUNABLES=glibc.cpu.hwcaps=-arch_3_1", "supportingMedia": [{"type": "text/html", "base64": false, "value": "One may disable the Power10 optimized string routines in glibc to work around this issue, by setting the <code>glibc.cpu.hwcaps</code> tunable. This can be done by exporting the <code>GLIBC_TUNABLES</code> environment variable like so:<br><br>\n\n<code>\nexport GLIBC_TUNABLES=glibc.cpu.hwcaps=-arch_3_1</code>"}]}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-665", "lang": "en", "description": "CWE-665 Improper Initialization"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.6, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-06-05T20:11:39.550335Z", "id": "CVE-2025-5745", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-06-05T20:13:51.068Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program."}, {"lang": "es", "value": "La implementaci\u00f3n de strncmp optimizada para el procesador Power10 en GNU C Library versi\u00f3n 2.40 y posteriores escribe en los registros vectoriales v20 a v31 sin guardar el contenido del llamador (esos registros est\u00e1n definidos como registros no vol\u00e1tiles por la ABI powerpc64le), lo que da como resultado la sobrescritura de su contenido y la posible alteraci\u00f3n del flujo de control del llamador o la filtraci\u00f3n de las cadenas de entrada a la funci\u00f3n a otras partes del programa."}], "id": "CVE-2025-5745", "lastModified": "2025-06-06T14:07:28.330", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-06-05T20:15:27.377", "references": [{"source": "3ff69d7a-14f2-4f67-a097-88dee7810d18", "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=33060"}], "sourceIdentifier": "3ff69d7a-14f2-4f67-a097-88dee7810d18", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-665"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "glibc: Vector register overwrite bug in glibc", "id": "2370488", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2370488"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-404", "details": ["The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program.", "A flaw was found in the strncmp glibc function optimized for the Power10 architecture. Overwriting two vector registers could disrupt program control flow, possibly leading to system instability."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-5745", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "compat-glibc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "compat-glibc", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-05T19:20:23Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-5745\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-5745\nhttps://sourceware.org/bugzilla/show_bug.cgi?id=33060"], "statement": "No Red Hat products or offerings are affected by this vulnerability.\nThis vulnerability is Important rather than Moderate \u2014 due to its potential to break fundamental ABI (Application Binary Interface) guarantees, which can have far-reaching implications for system stability and security. The PowerPC64LE ABI explicitly requires that non-volatile vector registers (v20\u2013v31) be preserved across function calls. By violating this contract, the optimized strncmp implementation in glibc 2.40+ introduces a low-level corruption risk that can cause subtle and hard-to-diagnose failures in user applications or system libraries relying on these registers. Such corruption can lead to control flow anomalies, crashes, or memory disclosure without any fault in the calling code \u2014 a particularly dangerous property.", "threat_severity": "Important"}