{"id":"RLSA-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":"2026-02-04T13:15:05.503613Z","published":"2021-11-18T16:29:15Z","upstream":["CVE-2021-42574"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:4743"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2005819"}],"affected":[{"package":{"name":"clang","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/clang?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-4.module+el8.5.0+715+58f51d49"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"compiler-rt","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/compiler-rt?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-1.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"libomp","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/libomp?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-1.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"lld","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/lld?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-1.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"lldb","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/lldb?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-1.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"llvm","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/llvm?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-2.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"llvm-toolset","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/llvm-toolset?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-1.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}},{"package":{"name":"python-lit","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/python-lit?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:12.0.1-1.module+el8.5.0+692+8756646f"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:4743.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}