# ELSA-2021-9037: Security update for 9 packages

ELSA-2021-9037, released February 8, 2021, fixes 6 CVEs across 9 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-9037
- Platform: Linux
- Released: Feb 8, 2021
- Priority: High (Closes CVE-2020-28374, high severity)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-9037.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel-uek](https://patchblox.com/security/data/product/linux/kernel-uek.md) | ol 8 | 0:5.4.17-2036.103.3.el8uek |
| [kernel-uek-debug](https://patchblox.com/security/data/product/linux/kernel-uek-debug.md) | ol 8 | 0:5.4.17-2036.103.3.el8uek |
| [kernel-uek-debug-devel](https://patchblox.com/security/data/product/linux/kernel-uek-debug-devel.md) | ol 8 | 0:5.4.17-2036.103.3.el8uek |
| [kernel-uek-devel](https://patchblox.com/security/data/product/linux/kernel-uek-devel.md) | ol 8 | 0:5.4.17-2036.103.3.el8uek |
| [kernel-uek-doc](https://patchblox.com/security/data/product/linux/kernel-uek-doc.md) | ol 8 | 0:5.4.17-2036.103.3.el8uek |
| [kernel-uek-tools](https://patchblox.com/security/data/product/linux/kernel-uek-tools.md) | ol 8 | 0:5.4.17-2036.103.3.el7uek |
| [kernel-uek-tools-libs](https://patchblox.com/security/data/product/linux/kernel-uek-tools-libs.md) | ol 8 | 0:5.4.17-2036.103.3.el7uek |
| [perf](https://patchblox.com/security/data/product/linux/perf.md) | ol 8 | 0:5.4.17-2036.103.3.el7uek |
| [python-perf](https://patchblox.com/security/data/product/linux/python-perf.md) | ol 8 | 0:5.4.17-2036.103.3.el7uek |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-28374](https://patchblox.com/security/data/cve/CVE-2020-28374.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 8.1 | 0.0664 |  |
| [CVE-2020-29569](https://patchblox.com/security/data/cve/CVE-2020-29569.md) | High | kernel-uek: [5.4.17-2036.103.3] - Revert 'rds: Deregister all FRWR mr with free_mr' (aru kolappan)  [Orabug: 32426610]  [5.4.17-2... | 8.8 | 0.0040 |  |
| [CVE-2020-36158](https://patchblox.com/security/data/cve/CVE-2020-36158.md) | Routine | kernel-devel: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es): * kernel: ou... | 6.7 | 0.0231 |  |
| [CVE-2020-29660](https://patchblox.com/security/data/cve/CVE-2020-29660.md) | Routine | kernel-debug-modules-extra: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es): * kernel: ou... | 4.4 | 0.0047 |  |
| [CVE-2020-29568](https://patchblox.com/security/data/cve/CVE-2020-29568.md) | Routine | kernel-uek-container: [5.4.17-2036.102.0.2.el7] - xen-blkback: set ring->xenblkd to NULL after kthread_stop() (Pawel Wieczorkiewicz)  [Orab... | 6.5 | 0.0036 |  |
| [CVE-2021-20177](https://patchblox.com/security/data/cve/CVE-2021-20177.md) | Routine | kernel-uek-tools: [5.4.17-2036.103.3] - Revert 'rds: Deregister all FRWR mr with free_mr' (aru kolappan)  [Orabug: 32426610]  [5.4.17-2... | 4.4 | 0.0028 |  |

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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