{"action":"Upgrade vtk9 to 9.1.0+really9.1.0+dfsg2-8 or later.","affected":[{"fixed":"9.1.0+really9.1.0+dfsg2-8","introduced":"0"}],"component":"vtk9","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["9.1.0+really9.1.0+dfsg2-8"],"id":"tcs_01M5NG0YHWZD7J231J9AZ5MATM","modified_at":"2026-10-23T18:04:16.469321253Z","published_at":"2022-08-25T18:15:09.140Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-42521","https://security-tracker.debian.org/tracker/CVE-2021-42521"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-42521#Debian:13/vtk9","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-42521"}],"summary":"There is a NULL pointer dereference vulnerability in VTK before 9.2.5, and it lies in IO/Infovis/vtkXMLTreeReader.cxx. The vendor didn't check the return value of libxml2 API 'xmlDocGetRootElement', a"}