# RHSA-2025:21118: kernel security update

RHSA-2025:21118, released September 23, 2025, fixes 11 CVEs in kernel (version 6.12.0-124.9.1.el10_1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-21118
- Platform: Linux
- Released: Sep 23, 2025
- Priority: High (Closes CVE-2025-39841, high severity)
- CVEs: 11, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:21118

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-124.9.1.el10_1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-39841](https://patchblox.com/security/data/cve/CVE-2025-39841.md) | High | scsi: lpfc: Fix buffer free/clear order in deferred receive path | 7.8 | 0.0048 |  |
| [CVE-2025-39702](https://patchblox.com/security/data/cve/CVE-2025-39702.md) | High | ipv6: sr: Fix MAC comparison to be constant-time | 7.1 | 0.0045 |  |
| [CVE-2025-39849](https://patchblox.com/security/data/cve/CVE-2025-39849.md) | High | wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result() | 7.8 | 0.0022 |  |
| [CVE-2025-38498](https://patchblox.com/security/data/cve/CVE-2025-38498.md) | High | do_change_type(): refuse to operate on unmounted/not ours mounts | 7.9 | 0.0022 |  |
| [CVE-2025-39727](https://patchblox.com/security/data/cve/CVE-2025-39727.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: mm: swap: fix potential buffer overflow in setup_... | 7.8 | 0.0018 |  |
| [CVE-2025-39757](https://patchblox.com/security/data/cve/CVE-2025-39757.md) | High | ALSA: usb-audio: Validate UAC3 cluster segment descriptors | 7.8 | 0.0018 |  |
| [CVE-2025-39718](https://patchblox.com/security/data/cve/CVE-2025-39718.md) | High | vsock/virtio: Validate length in packet header before skb_put() | 7.8 | 0.0017 |  |
| [CVE-2025-39817](https://patchblox.com/security/data/cve/CVE-2025-39817.md) | High | efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare | 7.6 | 0.0017 |  |
| [CVE-2025-39697](https://patchblox.com/security/data/cve/CVE-2025-39697.md) | High | NFS: Fix a race when updating an existing write | 7.6 | 0.0016 |  |
| [CVE-2025-39881](https://patchblox.com/security/data/cve/CVE-2025-39881.md) | High | kernfs: Fix UAF in polling when open file is released | 7.8 | 0.0015 |  |
| [CVE-2025-39751](https://patchblox.com/security/data/cve/CVE-2025-39751.md) | High | ALSA: hda/ca0132: Fix buffer overflow in add_tuning_control | 7.8 | n/a |  |

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Data as of 2026-11-09T01:18:40Z 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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