# RHSA-2026:35840: kernel security update

RHSA-2026:35840, released July 7, 2026, fixes 2 CVEs in kernel (version 6.12.0-55.86.1.el10_0). One of them is being exploited (CVE-2026-53362); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-35840
- Platform: Linux
- Released: Jul 7, 2026
- Priority: Patch now (Closes CVE-2026-53362, exploited (CISA KEV))
- CVEs: 2, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:35840

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-55.86.1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-53362](https://patchblox.com/security/data/cve/CVE-2026-53362.md) | Patch now | ipv6: account for fraggap on the paged allocation path | 7.8 | 0.0071 | CISA KEV |
| [CVE-2026-53366](https://patchblox.com/security/data/cve/CVE-2026-53366.md) | High | ipv4: account for fraggap on the paged allocation path | 8.5 | 0.0017 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo