CVE-2023-5197

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La adici\u00f3n y eliminaci\u00f3n de reglas de enlaces de cadena dentro de la misma transacci\u00f3n provoca que se produzca un use-after-free. Recomendamos actualizar despu\u00e9s del compromiso f15f29fd4779be8a418b66e9d52979bb6d6c2325."}], "id": "CVE-2023-5197", "lastModified": "2026-11-02T23:17:18.767", "metrics": {"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": "cve-coordination@google.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 4.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-5197", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-06-03T19:17:31.866619Z", "version": "2.0.3"}}]}, "published": "2023-09-27T15:19:43.110", "references": [{"source": "cve-coordination@google.com", "tags": ["Third Party Advisory"], "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"}, {"source": "cve-coordination@google.com", "tags": ["Patch"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325"}, {"source": "cve-coordination@google.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325"}, {"source": "cve-coordination@google.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://kernel.dance/f15f29fd4779be8a418b66e9d52979bb6d6c2325"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-794697.html"}], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "cve-coordination@google.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: netfilter: nf_tables: use-after-free due to addition and removal of rules from chain bindings within the same transaction", "id": "2241143", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241143"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.6", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\nAddition and removal of rules from chain bindings within the same transaction causes leads to use-after-free.\nWe recommend upgrading past commit f15f29fd4779be8a418b66e9d52979bb6d6c2325.", "A use-after-free vulnerability was found in net/netfilter/nf_tables_api.c in the netfilter component in the Linux Kernel. This flaw can be exploited to achieve local privilege escalation. Adding and removing rules from chain bindings within the same transaction leads to a use-after-free issue."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is to skip loading the affected module \"netfilter\" onto the system until we have a fix available. This can be done by a blacklist mechanism and will ensure the driver is not loaded at the boot time.\n~~~\nHow do I blacklist a kernel module to prevent it from loading automatically?\nhttps://access.redhat.com/solutions/41278 \n~~~"}, "name": "CVE-2023-5197", "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"}, {"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": "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": "2023-09-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-5197\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-5197\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f15f29fd4779be8a418b66e9d52979bb6d6c2325"], "statement": "Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace.\nAlso, on non-containerized deployments of Red Hat Enterprise Linux, you can disable user namespaces by setting the user.max_user_namespaces to 0:\n# echo \"user.max_user_namespaces=0\" > /etc/sysctl.d/userns.conf\n# sysctl -p /etc/sysctl.d/userns.conf\nOn containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality needs to be enabled.", "threat_severity": "Moderate"}

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