# ELSA-2021-4591: Security update for 3 packages

ELSA-2021-4591, released November 18, 2021, fixes 1 CVE across 3 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-4591
- Platform: Linux
- Released: Nov 18, 2021
- Priority: High (Closes CVE-2021-42574, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-4591.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [gcc-toolset-11-annobin-annocheck](https://patchblox.com/security/data/product/linux/gcc-toolset-11-annobin-annocheck.md) | ol 8 | 0:9.85-1.el8_5.1 |
| [gcc-toolset-11-annobin-docs](https://patchblox.com/security/data/product/linux/gcc-toolset-11-annobin-docs.md) | ol 8 | 0:9.85-1.el8_5.1 |
| [gcc-toolset-11-annobin-plugin-gcc](https://patchblox.com/security/data/product/linux/gcc-toolset-11-annobin-plugin-gcc.md) | ol 8 | 0:9.85-1.el8_5.1 |

## 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 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo