{"action":"Upgrade isc-dhcp to 4.2.2.dfsg.1-5 or later.","affected":[{"fixed":"4.2.2.dfsg.1-5","introduced":"0"}],"component":"isc-dhcp","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["4.2.2.dfsg.1-5"],"id":"tcs_01M5N9X6TQNJE2YMYY5E9989P2","modified_at":"2026-10-23T17:47:37.358450632Z","published_at":"2011-12-08T11:55:02.407Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2011-4539","https://security-tracker.debian.org/tracker/CVE-2011-4539"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2011-4539#Debian:13/isc-dhcp","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2011-4539"}],"summary":"dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash"}