# ELSA-2026-6571: Security update for 20 packages

ELSA-2026-6571, released April 7, 2026, fixes 4 CVEs across 20 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2026-6571
- Platform: Linux
- Released: Apr 7, 2026
- Priority: High (Closes CVE-2026-23231, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2026-6571.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bpftool](https://patchblox.com/security/data/product/linux/bpftool.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-abi-stablelists](https://patchblox.com/security/data/product/linux/kernel-abi-stablelists.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-core](https://patchblox.com/security/data/product/linux/kernel-core.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-cross-headers](https://patchblox.com/security/data/product/linux/kernel-cross-headers.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-debug](https://patchblox.com/security/data/product/linux/kernel-debug.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-debug-core](https://patchblox.com/security/data/product/linux/kernel-debug-core.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-debug-devel](https://patchblox.com/security/data/product/linux/kernel-debug-devel.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-debug-modules](https://patchblox.com/security/data/product/linux/kernel-debug-modules.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-debug-modules-extra.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-doc](https://patchblox.com/security/data/product/linux/kernel-doc.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-headers](https://patchblox.com/security/data/product/linux/kernel-headers.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-modules](https://patchblox.com/security/data/product/linux/kernel-modules.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-tools-libs](https://patchblox.com/security/data/product/linux/kernel-tools-libs.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [kernel-tools-libs-devel](https://patchblox.com/security/data/product/linux/kernel-tools-libs-devel.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [perf](https://patchblox.com/security/data/product/linux/perf.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |
| [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | ol 8 | 0:4.18.0-553.117.1.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-23231](https://patchblox.com/security/data/cve/CVE-2026-23231.md) | High | netfilter: nf_tables: fix use-after-free in nf_tables_addchain() | 7.8 | 0.0105 |  |
| [CVE-2026-23193](https://patchblox.com/security/data/cve/CVE-2026-23193.md) | High | kernel-rt-devel: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high... | 7.8 | 0.0036 |  |
| [CVE-2025-71238](https://patchblox.com/security/data/cve/CVE-2025-71238.md) | High | scsi: qla2xxx: Fix bsg_done() causing double free | 7.8 | 0.0022 |  |
| [CVE-2024-26984](https://patchblox.com/security/data/cve/CVE-2024-26984.md) | High | kernel-64kb: The SUSE Linux Enterprise 15 SP6 kernel was updated to receive various security bugfixes.   The following security bu... | 7.5 | 0.0020 |  |

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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