{"id":"ALPINE-CVE-2021-3537","details":"A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.","modified":"2026-09-15T08:17:46.667941345Z","published":"2021-05-14T20:15:16.553Z","upstream":["CVE-2021-3537"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2021-3537"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.9-r5"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.10-r5"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.10-r6"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.10-r7"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/libxml2?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.11-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2021-3537.json"}},{"package":{"name":"libxml2","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpin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