{"id":"RLSA-2021:2569","summary":"Moderate: libxml2 security update","details":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: Use-after-free in xmlEncodeEntitiesInternal() in entities.c (CVE-2021-3516)\n\n* libxml2: Heap-based buffer overflow in xmlEncodeEntitiesInternal() in entities.c (CVE-2021-3517)\n\n* libxml2: Use-after-free in xmlXIncludeDoProcess() in xinclude.c (CVE-2021-3518)\n\n* libxml2: NULL pointer dereference when post-validating mixed content parsed in recovery mode (CVE-2021-3537)\n\n* libxml2: Exponential entity expansion attack bypasses all existing protection mechanisms (CVE-2021-3541)\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":"2026-03-11T05:59:20.288239Z","published":"2021-06-29T13:42:19Z","upstream":["CVE-2021-3516","CVE-2021-3517","CVE-2021-3518","CVE-2021-3537","CVE-2021-3541"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:2569"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1950515"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1954225"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1954232"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1954242"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1956522"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/libxml2?distro=rocky-linux-8-4-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.9.7-9.el8_4.2"}],"database_specific":{"yum_repository":"BaseOS"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:2569.json"}}],"schema_version":"1.7.5","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"}]}