# RHSA-2021:4586: Security update for 18 packages

RHSA-2021:4586, released November 10, 2021, fixes 1 CVE across 18 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-4586
- Platform: Linux
- Released: Nov 10, 2021
- Priority: High (Closes CVE-2021-42574, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:4586

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [gcc-toolset-11-gcc](https://patchblox.com/security/data/product/linux/gcc-toolset-11-gcc.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-gcc-c++](https://patchblox.com/security/data/product/linux/gcc-toolset-11-gcc-c.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-gcc-gdb-plugin](https://patchblox.com/security/data/product/linux/gcc-toolset-11-gcc-gdb-plugin.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-gcc-gfortran](https://patchblox.com/security/data/product/linux/gcc-toolset-11-gcc-gfortran.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-gcc-plugin-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-gcc-plugin-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libasan-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libasan-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libatomic-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libatomic-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libgccjit](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libgccjit.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libgccjit-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libgccjit-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libgccjit-docs](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libgccjit-docs.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libitm-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libitm-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-liblsan-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-liblsan-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libquadmath-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libquadmath-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libstdc++-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libstdc-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libstdc++-docs](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libstdc-docs.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libtsan-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libtsan-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [gcc-toolset-11-libubsan-devel](https://patchblox.com/security/data/product/linux/gcc-toolset-11-libubsan-devel.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |
| [libasan6](https://patchblox.com/security/data/product/linux/libasan6.md) | RHEL 8 | 0:11.2.1-1.2.el8_5 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-42574](https://patchblox.com/security/data/cve/CVE-2021-42574.md) | High | clang-libs: LLVM Toolset provides the LLVM compiler infrastructure framework, the Clang compiler for the C and C++ languages, the... | 8.5 | 0.1288 |  |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo