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{"bugzilla": {"description": "kernel: reference count usage error in fib6_rule_suppress function in net/ipv6/fib6_rules.c", "id": "1771486", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1771486"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel before 5.3.4, a reference count usage error in the fib6_rule_suppress() function in the fib6 suppression feature of net/ipv6/fib6_rules.c, when handling the FIB_LOOKUP_NOREF flag, can be exploited by a local attacker to corrupt memory, aka CID-ca7a03c41753.", "A flaw was found in the Linux kernel\u2019s IPv6 routing system. A local attacker with the ability to configure routing can create a situation where they can corrupt memory or possibly escalate privileges."], "mitigation": {"lang": "en:us", "value": "As the IPV6 module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions:\nhttps://access.redhat.com/solutions/8790\nIf the system requires IPV6 to work correctly, this mitigation may not be suitable.\nIf you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services."}, "name": "CVE-2019-18198", "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"}, {"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": "Will not fix", "package_name": "kernel-alt", "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:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2019-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-18198\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-18198"], "statement": "This flaw is rated as moderate as setting up the condition requires CAP_NET_ADMIN privileges which are not available to regular users.", "threat_severity": "Moderate", "upstream_fix": "Kernel 5.4"}