{"id":"ALSA-2021:4743","summary":"Moderate: llvm-toolset:rhel8 security update","details":"LLVM Toolset provides the LLVM compiler infrastructure framework, the Clang compiler for the C and C++ languages, the LLDB debugger, and related tools for code analysis.\n\nSecurity Fix(es):\n\n* Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574)\n\nThe following changes were introduced in clang in order to facilitate detection of BiDi Unicode characters:\n\nclang-tidy now finds identifiers that contain Unicode characters with right-to-left direction, which can be confusing as they may change the understanding of a whole statement.\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":"2026-02-04T02:41:05.541095Z","published":"2021-11-18T16:29:15Z","related":["CVE-2021-42574"],"references":[{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-42574"}],"affected":[{"package":{"name":"clang","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/clang"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"clang-analyzer","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/clang-analyzer"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"clang-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/clang-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"clang-libs","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/clang-libs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"clang-resource-filesystem","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/clang-resource-filesystem"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"clang-tools-extra","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/clang-tools-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"compiler-rt","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/compiler-rt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"git-clang-format","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/git-clang-format"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-4.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"libomp","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/libomp"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"libomp-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/libomp-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"libomp-test","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/libomp-test"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"lld","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/lld"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"lld-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/lld-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":{"name":"lld-libs","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/lld-libs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"12.0.1-1.module_el8.4.0+2600+cefb5d4c"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:4743.json"}},{"package":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