# ELSA-2021-2168: Security update for 20 packages

ELSA-2021-2168, released June 2, 2021, fixes 2 CVEs across 20 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-2168
- Platform: Linux
- Released: Jun 2, 2021
- Priority: High (Closes CVE-2021-3501, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-2168.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bpftool](https://patchblox.com/security/data/product/linux/bpftool.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-abi-stablelists](https://patchblox.com/security/data/product/linux/kernel-abi-stablelists.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-core](https://patchblox.com/security/data/product/linux/kernel-core.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-cross-headers](https://patchblox.com/security/data/product/linux/kernel-cross-headers.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-debug](https://patchblox.com/security/data/product/linux/kernel-debug.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-debug-core](https://patchblox.com/security/data/product/linux/kernel-debug-core.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-debug-devel](https://patchblox.com/security/data/product/linux/kernel-debug-devel.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-debug-modules](https://patchblox.com/security/data/product/linux/kernel-debug-modules.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-debug-modules-extra.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-doc](https://patchblox.com/security/data/product/linux/kernel-doc.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-headers](https://patchblox.com/security/data/product/linux/kernel-headers.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-modules](https://patchblox.com/security/data/product/linux/kernel-modules.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-tools-libs](https://patchblox.com/security/data/product/linux/kernel-tools-libs.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [kernel-tools-libs-devel](https://patchblox.com/security/data/product/linux/kernel-tools-libs-devel.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [perf](https://patchblox.com/security/data/product/linux/perf.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |
| [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | ol 8 | 0:4.18.0-305.3.1.el8_4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-3501](https://patchblox.com/security/data/cve/CVE-2021-3501.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 7.8 | 0.0038 |  |
| [CVE-2021-3543](https://patchblox.com/security/data/cve/CVE-2021-3543.md) | Routine | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 6.7 | 0.0030 |  |

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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