{"cve":"CVE-2019-18805","nvd":{"published":"2019-11-07T14:15:11.067","modified":"2026-06-17T02:25:22.157","status":"Modified","description":"An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-190"],"references":["http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html","http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html","https://access.redhat.com/errata/RHSA-2020:0740","https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11","https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78"],"products":["broadcom:fabric_operating_system","linux:linux_kernel","netapp:active_iq_unified_manager","netapp:aff_a400_firmware","netapp:aff_a700s_firmware","netapp:data_availability_services","netapp:e-series_santricity_os_controller","netapp:fas8300_firmware","netapp:fas8700_firmware","netapp:h610s_firmware","netapp:hci_compute_node","netapp:hci_management_node","netapp:hci_storage_node","netapp:solidfire","netapp:steelstore_cloud_integrated_storage","opensuse:leap","redhat:enterprise_linux"],"source":"nvd","synced_at":"2026-10-19T20:59:25.448946135+00:00"},"epss":{"cve":"CVE-2019-18805","score":0.03474,"percentile":0.89091,"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."]}