# RHSA-2025:9348: kernel security update

RHSA-2025:9348, released May 1, 2025, fixes 3 CVEs in kernel (version 6.12.0-55.18.1.el10_0). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-9348
- Platform: Linux
- Released: May 1, 2025
- Priority: High (Closes CVE-2025-21999, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:9348

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-55.18.1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-21999](https://patchblox.com/security/data/cve/CVE-2025-21999.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: e... | 7.8 | 0.0023 |  |
| [CVE-2025-23150](https://patchblox.com/security/data/cve/CVE-2025-23150.md) | High | ext4: fix off-by-one error in do_split | 8.4 | 0.0023 |  |
| [CVE-2025-37738](https://patchblox.com/security/data/cve/CVE-2025-37738.md) | High | ext4: ignore xattrs past end | 7.8 | 0.0022 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo