# RHSA-2025:18318: kernel security update

RHSA-2025:18318, released August 19, 2025, fixes 3 CVEs in kernel (version 6.12.0-55.40.1.el10_0). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-18318
- Platform: Linux
- Released: Aug 19, 2025
- Priority: High (Closes CVE-2025-38571, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:18318

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-55.40.1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-38571](https://patchblox.com/security/data/cve/CVE-2025-38571.md) | High | sunrpc: fix client side handling of tls alerts | 8.1 | 0.0035 |  |
| [CVE-2025-38572](https://patchblox.com/security/data/cve/CVE-2025-38572.md) | High | ipv6: reject malicious packets in ipv6_gso_segment() | 7.8 | 0.0019 |  |
| [CVE-2025-38351](https://patchblox.com/security/data/cve/CVE-2025-38351.md) | High | KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush | 7.5 | 0.0019 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo