# RHSA-2026:22334: kernel security update

RHSA-2026:22334, released April 30, 2026, fixes 5 CVEs in kernel (version 6.12.0-55.76.1.el10_0). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-22334
- Platform: Linux
- Released: Apr 30, 2026
- Priority: High (Closes CVE-2025-39766, high severity)
- CVEs: 5, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:22334

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-55.76.1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-39766](https://patchblox.com/security/data/cve/CVE-2025-39766.md) | High | net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit | 8.1 | 0.0018 |  |
| [CVE-2026-31419](https://patchblox.com/security/data/cve/CVE-2026-31419.md) | High | net: bonding: fix use-after-free in bond_xmit_broadcast() | 8.8 | 0.0013 |  |
| [CVE-2026-23210](https://patchblox.com/security/data/cve/CVE-2026-23210.md) | High | kernel-rt-core: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: L... | 7.5 | 0.0010 |  |
| [CVE-2026-43163](https://patchblox.com/security/data/cve/CVE-2026-43163.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved:  md/bitmap: fix GPF in write_page caused by resiz... | 8.1 | 0.0009 |  |
| [CVE-2024-56547](https://patchblox.com/security/data/cve/CVE-2024-56547.md) | Routine | linux: In the Linux kernel, the following vulnerability has been resolved:  rcu/nocb: Fix missed RCU barrier on deoffloading... | 5.5 | 0.0021 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo