CVE-2025-40363

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Fix by properly\ncopying addresses and extension headers separately, and introduce\nhelper functions to avoid code duplication."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: ipv6: corregir advertencia de memcpy que abarca campos en la salida AH\n\nCorrige las advertencias de memcpy que abarcan campos en ah6_output() y ah6_output_done() donde las cabeceras de extensi\u00f3n son copiadas a/desde campos de direcci\u00f3n IPv6, lo que activa advertencias de fortify-string sobre escrituras m\u00e1s all\u00e1 de los campos de direcci\u00f3n de 16 bytes.\n\nmemcpy: escritura que abarca campos detectada (tama\u00f1o 40) del campo \u00fanico '&top_iph -> saddr' en net/ipv6/ah6.c:439 (tama\u00f1o 16)\nADVERTENCIA: CPU: 0 PID: 8838 en net/ipv6/ah6.c:439 ah6_output+0xe7e/0x14e0 net/ipv6/ah6.c:439\n\nLas advertencias son falsos positivos ya que las cabeceras de extensi\u00f3n se colocan intencionalmente despu\u00e9s de la cabecera IPv6 en memoria. Se corrige copiando correctamente las direcciones y las cabeceras de extensi\u00f3n por separado, e introduciendo funciones auxiliares para evitar la duplicaci\u00f3n de c\u00f3digo."}], "id": "CVE-2025-40363", "lastModified": "2026-10-14T13:10:00.187", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-40363", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-16T19:57:03.348828Z", "version": "2.0.3"}}]}, "published": "2025-12-16T14:15:48.327", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0bf756ae1e69fec5e6332c37830488315d6d771b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2327a3d6f65ce2fe2634546dde4a25ef52296fec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2da805a61ef5272a2773775ce14c3650adb84248"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/75b16b2755e12999ad850756ddfb88ad4bfc7186"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9bf27de51bd6db5ff827780ec0eba55de230ba45"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b056f971bd72b373b7ae2025a8f3bd18f69653d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c14cf41094136691c92ef756872570645d61f4a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f28dde240160f3c48a50d641d210ed6a3b9596ed"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: net: ipv6: fix field-spanning memcpy warning in AH output", "id": "2422655", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422655"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-40363", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2025-40363\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40363\nhttps://lore.kernel.org/linux-cve-announce/2025121645-CVE-2025-40363-bbdd@gregkh/T"], "threat_severity": "Moderate"}

{}