# RHSA-2026:36348: Security update for 12 packages

RHSA-2026:36348, released July 8, 2026, fixes 6 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-36348
- Platform: Linux
- Released: Jul 8, 2026
- Priority: Urgent (Closes CVE-2025-10263, rated Critical)
- CVEs: 6, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:36348

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel-rt](https://patchblox.com/security/data/product/linux/kernel-rt.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-core](https://patchblox.com/security/data/product/linux/kernel-rt-core.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-debug](https://patchblox.com/security/data/product/linux/kernel-rt-debug.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-core.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-debug-devel.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-debug-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-debug-kvm.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-devel](https://patchblox.com/security/data/product/linux/kernel-rt-devel.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-kvm.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-modules](https://patchblox.com/security/data/product/linux/kernel-rt-modules.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |
| [kernel-rt-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-modules-extra.md) | RHEL 8 | 0:4.18.0-553.140.1.rt7.481.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-10263](https://patchblox.com/security/data/cve/CVE-2025-10263.md) | Urgent | ARM: CVE-2025-10263 Completion of affected memory accesses might not be guaranteed by completion of a TLBI [kernel] | 9.3 | 0.0054 |  |
| [CVE-2026-43198](https://patchblox.com/security/data/cve/CVE-2026-43198.md) | High | tcp: fix potential race in tcp_v6_syn_recv_sock() | 9.8 | 0.0030 |  |
| [CVE-2026-46209](https://patchblox.com/security/data/cve/CVE-2026-46209.md) | High | kernel-uek-core: [5.15.0-323.211.3.3] - Revert 'x86/alternatives: Add alt_instr.flags' (Harshit Mogalapalli)  [Orabug: 39853924]  [5.1... | 8.4 | 0.0014 |  |
| [CVE-2026-43450](https://patchblox.com/security/data/cve/CVE-2026-43450.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: f... | 8.8 | 0.0013 |  |
| [CVE-2026-46259](https://patchblox.com/security/data/cve/CVE-2026-46259.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved:  procfs: fix missing RCU protection when reading... | 8.4 | 0.0012 |  |
| [CVE-2026-46227](https://patchblox.com/security/data/cve/CVE-2026-46227.md) | High | sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL | 8.4 | 0.0010 |  |

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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