# RHSA-2025:11855: kernel security update

RHSA-2025:11855, released July 3, 2025, fixes 5 CVEs in kernel (version 6.12.0-55.24.1.el10_0). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-11855
- Platform: Linux
- Released: Jul 3, 2025
- Priority: High (Closes CVE-2025-37797, high severity)
- CVEs: 5, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:11855

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-55.24.1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-37797](https://patchblox.com/security/data/cve/CVE-2025-37797.md) | High | net_sched: hfsc: Fix a UAF vulnerability in class handling | 7.8 | 0.0023 |  |
| [CVE-2025-22121](https://patchblox.com/security/data/cve/CVE-2025-22121.md) | High | ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() | 7.1 | 0.0022 |  |
| [CVE-2025-22091](https://patchblox.com/security/data/cve/CVE-2025-22091.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix page_size variable overflow Change... | 7.1 | 0.0020 |  |
| [CVE-2025-38110](https://patchblox.com/security/data/cve/CVE-2025-38110.md) | High | net/mdiobus: Fix potential out-of-bounds clause 45 read/write access | 7.1 | 0.0020 |  |
| [CVE-2025-38088](https://patchblox.com/security/data/cve/CVE-2025-38088.md) | High | powerpc/powernv/memtrace: Fix out of bounds issue in memtrace mmap | 7.1 | 0.0019 |  |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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