# RHSA-2023:4541: Security update for 12 packages

RHSA-2023:4541, released August 8, 2023, fixes 6 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2023-4541
- Platform: Linux
- Released: Aug 8, 2023
- Priority: High (Closes CVE-2022-42896, high severity)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2023:4541

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel-rt](https://patchblox.com/security/data/product/linux/kernel-rt.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-core](https://patchblox.com/security/data/product/linux/kernel-rt-core.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-debug](https://patchblox.com/security/data/product/linux/kernel-rt-debug.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-core.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-debug-devel.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-debug-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-debug-kvm.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-devel](https://patchblox.com/security/data/product/linux/kernel-rt-devel.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-kvm.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-modules](https://patchblox.com/security/data/product/linux/kernel-rt-modules.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |
| [kernel-rt-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-modules-extra.md) | RHEL 8 | 0:4.18.0-477.21.1.rt7.284.el8_8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-42896](https://patchblox.com/security/data/cve/CVE-2022-42896.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 8.8 | 0.0246 |  |
| [CVE-2023-1829](https://patchblox.com/security/data/cve/CVE-2023-1829.md) | High | linux: A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve... | 8.1 | 0.0106 |  |
| [CVE-2023-2124](https://patchblox.com/security/data/cve/CVE-2023-2124.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 8.1 | 0.0049 |  |
| [CVE-2023-1281](https://patchblox.com/security/data/cve/CVE-2023-1281.md) | High | linux: Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The... | 8.1 | 0.0030 |  |
| [CVE-2023-2235](https://patchblox.com/security/data/cve/CVE-2023-2235.md) | High | linux: A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privil... | 8.1 | 0.0025 |  |
| [CVE-2023-2194](https://patchblox.com/security/data/cve/CVE-2023-2194.md) | High | kernel-debug-modules: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: u... | 8.1 | 0.0024 |  |

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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