CVE-2016-9793

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sock_setsockopt en net/core/sock.c en el kernel de Linux en versiones anteriores a 4.8.14 no maneja adecuadamente valores negativos de sk_sndbuf y sk_rcvbuf, lo que permite a usuarios locales provocar una denegaci\u00f3n de servicio (corrupci\u00f3n de memoria y ca\u00edda del sistema) o posiblemente tener otros impactos no especificados aprovechando la capacidad CAP_NET_ADMIN para una llamada al sistema setsockopt manipulada con la opci\u00f3n (1) SO_SNDBUFFORCE o (2) SO_RCVBUFFORCE."}], "id": "CVE-2016-9793", "lastModified": "2026-06-17T00:56:33.103", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-12-28T07:59:00.557", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b98b0bc8c431e3ceb4b26b0dfc8db509518fb290"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": 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{"affected_release": [{"advisory": "RHSA-2017:0931", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-514.16.1.rt56.437.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-04-12T00:00:00Z"}, {"advisory": "RHSA-2017:0933", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-514.16.1.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-04-12T00:00:00Z"}, {"advisory": "RHSA-2017:0932", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-1:3.10.0-514.rt56.219.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2017-04-12T00:00:00Z"}], "bugzilla": {"description": "kernel: Signed overflow for SO_{SND|RCV}BUFFORCE", "id": "1402013", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1402013"}, "csaw": false, "cvss": {"cvss_base_score": "6.9", "cvss_scoring_vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "status": "verified"}, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-190", "details": ["The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option.", "A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative. This could adversely affect memory allocations and create situations where the system could crash or cause memory corruption."], "name": "CVE-2016-9793", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2016-12-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-9793\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-9793"], "statement": "This issue does not affect the kernels as shipping with Red Hat Enterprise Linux 5 and 6. This issue does affect kernels 7, MRG-2 and realtime kernels and plans to be fixed in a future update.", "threat_severity": "Moderate"}

{}