# RHSA-2026:45115: Security update for 23 packages

RHSA-2026:45115, released July 25, 2026, fixes 4 CVEs across 23 products. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-45115
- Platform: Linux
- Released: Jul 25, 2026
- Priority: Urgent (Closes CVE-2026-52993, rated Critical)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:45115

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [bpftool](https://patchblox.com/security/data/product/linux/bpftool.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-abi-stablelists](https://patchblox.com/security/data/product/linux/kernel-abi-stablelists.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-core](https://patchblox.com/security/data/product/linux/kernel-core.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-debug](https://patchblox.com/security/data/product/linux/kernel-debug.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-debug-core](https://patchblox.com/security/data/product/linux/kernel-debug-core.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-debug-devel](https://patchblox.com/security/data/product/linux/kernel-debug-devel.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-debug-modules](https://patchblox.com/security/data/product/linux/kernel-debug-modules.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-doc](https://patchblox.com/security/data/product/linux/kernel-doc.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-modules](https://patchblox.com/security/data/product/linux/kernel-modules.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-tools-libs](https://patchblox.com/security/data/product/linux/kernel-tools-libs.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-tools-libs-devel](https://patchblox.com/security/data/product/linux/kernel-tools-libs-devel.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-zfcpdump](https://patchblox.com/security/data/product/linux/kernel-zfcpdump.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-zfcpdump-core](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-core.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-zfcpdump-devel](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-devel.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-zfcpdump-modules](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [kernel-zfcpdump-modules-extra](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules-extra.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [perf](https://patchblox.com/security/data/product/linux/perf.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |
| [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | RHEL 8 | 0:4.18.0-553.147.1.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-52993](https://patchblox.com/security/data/cve/CVE-2026-52993.md) | Urgent | tipc: fix double-free in tipc_buf_append() | 9.8 | 0.0040 |  |
| [CVE-2026-64561](https://patchblox.com/security/data/cve/CVE-2026-64561.md) | High | KVM: x86: Check for invalid/obsolete root *after* making MMU pages available | 8.8 | 0.0027 |  |
| [CVE-2025-40026](https://patchblox.com/security/data/cve/CVE-2025-40026.md) | High | KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O | 7.9 | 0.0017 |  |
| [CVE-2026-53059](https://patchblox.com/security/data/cve/CVE-2026-53059.md) | High | dm log: fix out-of-bounds write due to region_count overflow | 7.8 | 0.0014 |  |

---

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