{"id":"RLSA-2026:67909","summary":"Important: libevent security update","details":"The libevent packages provide an abstract asynchronous event notification library.\n\nSecurity Fix(es):\n\n* libevent: Libevent: Denial of Service via malformed RPC data (CVE-2026-63383)\n\n* libevent: Libevent: Off-by-one stack buffer overflow leading to denial of service or data corruption (CVE-2026-63387)\n\n* libevent: Libevent: Memory corruption due to use-after-free (CVE-2026-63381)\n\n* libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header` (CVE-2026-63384)\n\n* libevent evhttp: Multiple HTTP Parser Bugs Enable Request Smuggling (CVE-2026-63382)\n\n* libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling (CVE-2026-63388)\n\n* libevent: Libevent: HTTP header handling bugs create risk of access control bypass. (CVE-2026-63385)\n\n* libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning (CVE-2026-63379)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-09-17T12:30:02.601512822Z","published":"2026-09-17T12:09:45.694481Z","upstream":["CVE-2026-63379","CVE-2026-63381","CVE-2026-63382","CVE-2026-63383","CVE-2026-63384","CVE-2026-63385","CVE-2026-63387","CVE-2026-63388"],"database_specific":{"source_advisory":"RHSA-2026:67909","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:67909"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520654"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520655"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520657"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520658"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520660"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520661"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520666"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2520667"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:67909"}],"affected":[{"package":{"name":"libevent","ecosystem":"Rocky Linux:10","purl":"pkg:rpm/rocky-linux/libevent?distro=rocky-linux-10&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.1.13-1.el10_2"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:67909.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}