ALSA-2021:4743

    Dashboard / Vulnerabilities / ALSA-2021:4743

    ALSA-2021:4743

    Published: 18 Nov 2021Last Modified: 4 Feb 2026

    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. Security Fix(es): * Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574) The following changes were introduced in clang in order to facilitate detection of BiDi Unicode characters: clang-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. For 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.

    Affected packages

    Package

    Name: clang

    Purl: pkg:rpm/almalinux/clang

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -12.0.1-4.module_el8.4.0+2600+cefb5d4c

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    ALSA-2021:4743 | CVE-DB