# RHSA-2022:1535: Security update for 5 packages

RHSA-2022:1535, released April 26, 2022, fixes 2 CVEs across 5 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2022-1535
- Platform: Linux
- Released: Apr 26, 2022
- Priority: High (Closes CVE-2022-25636, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2022:1535

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kpatch-patch-4_18_0-348](https://patchblox.com/security/data/product/linux/kpatch-patch-4-18-0-348.md) | RHEL 8 | 0:1-4.el8 |
| [kpatch-patch-4_18_0-348_12_2](https://patchblox.com/security/data/product/linux/kpatch-patch-4-18-0-348-12-2.md) | RHEL 8 | 0:1-2.el8_5 |
| [kpatch-patch-4_18_0-348_20_1](https://patchblox.com/security/data/product/linux/kpatch-patch-4-18-0-348-20-1.md) | RHEL 8 | 0:1-1.el8_5 |
| [kpatch-patch-4_18_0-348_2_1](https://patchblox.com/security/data/product/linux/kpatch-patch-4-18-0-348-2-1.md) | RHEL 8 | 0:1-3.el8_5 |
| [kpatch-patch-4_18_0-348_7_1](https://patchblox.com/security/data/product/linux/kpatch-patch-4-18-0-348-7-1.md) | RHEL 8 | 0:1-3.el8_5 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-25636](https://patchblox.com/security/data/cve/CVE-2022-25636.md) | High | kernel-rt-core: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high... | 7.8 | 0.0263 |  |
| [CVE-2021-4028](https://patchblox.com/security/data/cve/CVE-2021-4028.md) | High | kernel-rt-debug: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high... | 7.8 | 0.0032 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo