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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3769AA63-B0A8-4EF1-96F9-6A6A6B305A02", "versionEndExcluding": "6.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The IPv6 implementation in the Linux kernel before 6.3 has a net/ipv6/route.c max_size threshold that can be consumed easily, e.g., leading to a denial of service (network is unreachable errors) when IPv6 packets are sent in a loop via a raw socket."}, {"lang": "es", "value": "La implementaci\u00f3n de IPv6 en el kernel de Linux anterior a 6.3 tiene un umbral net/ipv6/route.c max_size que se puede consumir f\u00e1cilmente, por ejemplo, provocando una denegaci\u00f3n de servicio (errores de red inaccesible) cuando los paquetes IPv6 se env\u00edan en un bucle a trav\u00e9s de un enchufe crudo."}], "id": "CVE-2023-52340", "lastModified": "2025-11-04T18:15:49.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-07-05T02:15:09.747", "references": [{"source": "[email protected]", "tags": ["Mailing List", "Patch"], "url": "https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3"}, {"source": "[email protected]", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=af6d10345ca76670c1b7c37799f0d5576ccef277"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=af6d10345ca76670c1b7c37799f0d5576ccef277"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240816-0005/"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "[email protected]", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2024:2950", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.rt7.342.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-05-22T00:00:00Z"}, {"advisory": "RHSA-2024:3138", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-05-22T00:00:00Z"}, {"advisory": "RHSA-2023:2458", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}, {"advisory": "RHSA-2023:2148", "cpe": "cpe:/a:redhat:enterprise_linux:9::nfv", "package": "kernel-rt-0:5.14.0-284.11.1.rt14.296.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}, {"advisory": "RHSA-2023:2458", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-284.11.1.el9_2", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-05-09T00:00:00Z"}], "bugzilla": {"description": "kernel: ICMPv6 \u201cPacket Too Big\u201d packets force a DoS of the Linux kernel by forcing 100% CPU", "id": "2257979", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2257979"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-400", "details": ["The IPv6 implementation in the Linux kernel before 6.3 has a net/ipv6/route.c max_size threshold that can be consumed easily, e.g., leading to a denial of service (network is unreachable errors) when IPv6 packets are sent in a loop via a raw socket.", "A flaw in the routing table size was found in the ICMPv6 handling of \"Packet Too Big\". The size of the routing table is regulated by periodic garbage collection. However, with \"Packet Too Big Messages\" it is possible to exceed the routing table size and garbage collector threshold. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95%."], "name": "CVE-2023-52340", "package_state": [{"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"}], "public_date": "2024-01-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52340\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52340\nhttps://alas.aws.amazon.com/cve/html/CVE-2023-52340.html\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=af6d10345ca76670c1b7c37799f0d5576ccef277"], "threat_severity": "Moderate"}