{"cve":"CVE-2018-5391","nvd":{"published":"2018-09-06T21:29:00.363","modified":"2026-06-17T02:00:14.983","status":"Modified","description":"The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-20","CWE-400"],"references":["http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt","http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200115-01-linux-en","http://www.openwall.com/lists/oss-security/2019/06/28/2","http://www.openwall.com/lists/oss-security/2019/07/06/3","http://www.openwall.com/lists/oss-security/2019/07/06/4"],"products":["canonical:ubuntu_linux","debian:debian_linux","f5:big-ip_access_policy_manager","f5:big-ip_advanced_firewall_manager","f5:big-ip_analytics","f5:big-ip_application_acceleration_manager","f5:big-ip_application_security_manager","f5:big-ip_domain_name_system","f5:big-ip_edge_gateway","f5:big-ip_fraud_protection_service","f5:big-ip_global_traffic_manager","f5:big-ip_link_controller","f5:big-ip_local_traffic_manager","f5:big-ip_policy_enforcement_manager","f5:big-ip_webaccelerator","linux:linux_kernel","microsoft:windows_10","microsoft:windows_7","microsoft:windows_8.1","microsoft:windows_rt_8.1","microsoft:windows_server_2008","microsoft:windows_server_2012","microsoft:windows_server_2016","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_server_aus","redhat:enterprise_linux_server_eus","redhat:enterprise_linux_server_tus","redhat:enterprise_linux_workstation","siemens:ruggedcom_rm1224_firmware","siemens:ruggedcom_rox_ii_firmware","siemens:scalance_m-800_firmware","siemens:scalance_s615_firmware","siemens:scalance_sc-600_firmware","siemens:scalance_w1700_ieee_802.11ac_firmware","siemens:scalance_w700_ieee_802.11a\\/b\\/g\\/n_firmware","siemens:simatic_net_cp_1242-7_firmware","siemens:simatic_net_cp_1243-1_firmware","siemens:simatic_net_cp_1243-7_lte_eu_firmware","siemens:simatic_net_cp_1243-7_lte_us_firmware","siemens:simatic_net_cp_1243-8_irc_firmware","siemens:simatic_net_cp_1542sp-1_firmware","siemens:simatic_net_cp_1542sp-1_irc_firmware","siemens:simatic_net_cp_1543-1_firmware","siemens:simatic_net_cp_1543sp-1_firmware","siemens:simatic_rf185c_firmware","siemens:simatic_rf186c_firmware","siemens:simatic_rf186ci_firmware","siemens:simatic_rf188_firmware","siemens:simatic_rf188ci_firmware"],"source":"nvd","synced_at":"2026-10-19T20:53:14.491561039+00:00"},"epss":{"cve":"CVE-2018-5391","score":0.32445,"percentile":0.98334,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}