# ELSA-2021-9140: Security update for 9 packages

ELSA-2021-9140, released March 31, 2021, fixes 8 CVEs across 9 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-9140
- Platform: Linux
- Released: Mar 31, 2021
- Priority: High (Closes CVE-2021-27365, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-9140.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel-uek](https://patchblox.com/security/data/product/linux/kernel-uek.md) | ol 8 | 0:5.4.17-2102.200.13.el8uek |
| [kernel-uek-debug](https://patchblox.com/security/data/product/linux/kernel-uek-debug.md) | ol 8 | 0:5.4.17-2102.200.13.el8uek |
| [kernel-uek-debug-devel](https://patchblox.com/security/data/product/linux/kernel-uek-debug-devel.md) | ol 8 | 0:5.4.17-2102.200.13.el8uek |
| [kernel-uek-devel](https://patchblox.com/security/data/product/linux/kernel-uek-devel.md) | ol 8 | 0:5.4.17-2102.200.13.el8uek |
| [kernel-uek-doc](https://patchblox.com/security/data/product/linux/kernel-uek-doc.md) | ol 8 | 0:5.4.17-2102.200.13.el8uek |
| [kernel-uek-tools](https://patchblox.com/security/data/product/linux/kernel-uek-tools.md) | ol 8 | 0:5.4.17-2102.200.13.el7uek |
| [kernel-uek-tools-libs](https://patchblox.com/security/data/product/linux/kernel-uek-tools-libs.md) | ol 8 | 0:5.4.17-2102.200.13.el7uek |
| [perf](https://patchblox.com/security/data/product/linux/perf.md) | ol 8 | 0:5.4.17-2102.200.13.el7uek |
| [python-perf](https://patchblox.com/security/data/product/linux/python-perf.md) | ol 8 | 0:5.4.17-2102.200.13.el7uek |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-27365](https://patchblox.com/security/data/cve/CVE-2021-27365.md) | High | kernel-debug-core: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 7.8 | 0.0210 |  |
| [CVE-2021-27364](https://patchblox.com/security/data/cve/CVE-2021-27364.md) | High | kernel-debug-core: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 7.1 | 0.0097 |  |
| [CVE-2021-3444](https://patchblox.com/security/data/cve/CVE-2021-3444.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es): * kernel: ou... | 7.8 | 0.0061 |  |
| [CVE-2020-28588](https://patchblox.com/security/data/cve/CVE-2020-28588.md) | Routine | kernel-uek: [5.4.17-2102.200.13] - bpf, selftests: Fix up some test_verifier cases for unprivileged (Piotr Krysiuk)  [Orabug: 326... | 5.5 | 0.0110 |  |
| [CVE-2021-27363](https://patchblox.com/security/data/cve/CVE-2021-27363.md) | Routine | kernel-debug-core: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 4.4 | 0.0071 |  |
| [CVE-2020-27171](https://patchblox.com/security/data/cve/CVE-2020-27171.md) | Routine | kernel-uek: [5.4.17-2102.200.13] - bpf, selftests: Fix up some test_verifier cases for unprivileged (Piotr Krysiuk)  [Orabug: 326... | 6.0 | 0.0058 |  |
| [CVE-2020-27170](https://patchblox.com/security/data/cve/CVE-2020-27170.md) | Routine | kernel-uek: [5.4.17-2102.200.13] - bpf, selftests: Fix up some test_verifier cases for unprivileged (Piotr Krysiuk)  [Orabug: 326... | 4.7 | 0.0057 |  |
| [CVE-2020-25639](https://patchblox.com/security/data/cve/CVE-2020-25639.md) | Routine | python-perf: [5.4.17-2102.200.13] - bpf, selftests: Fix up some test_verifier cases for unprivileged (Piotr Krysiuk)  [Orabug: 326... | 4.4 | 0.0037 |  |

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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