{"cve":"CVE-2018-20784","nvd":{"published":"2019-02-22T15:29:00.237","modified":"2026-06-17T01:53:28.050","status":"Modified","description":"In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.","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-835"],"references":["http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0","https://access.redhat.com/errata/RHSA-2019:1959","https://access.redhat.com/errata/RHSA-2019:1971","https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2","https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0"],"products":["canonical:ubuntu_linux","linux:linux_kernel","redhat:enterprise_linux","redhat:enterprise_linux_for_real_time"],"source":"nvd","synced_at":"2026-10-19T20:54:46.948512734+00:00"},"epss":{"cve":"CVE-2018-20784","score":0.04173,"percentile":0.90906,"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."]}