# RLSA-2026:55764: kernel security update

RLSA-2026:55764, released August 18, 2026, fixes 10 CVEs in kernel (version 0:4.18.0-553.156.1.el8_10). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rlsa-2026-55764
- Platform: Linux
- Released: Aug 18, 2026
- Priority: Urgent (Closes CVE-2026-53374, rated Critical)
- CVEs: 10, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://errata.rockylinux.org/RLSA-2026:55764

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | rocky 8 | 0:4.18.0-553.156.1.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-53374](https://patchblox.com/security/data/cve/CVE-2026-53374.md) | Urgent | drm/amdgpu: zero-initialize GART table on allocation | 9.8 | 0.0013 |  |
| [CVE-2026-63884](https://patchblox.com/security/data/cve/CVE-2026-63884.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: m... | 7.8 | 0.0018 |  |
| [CVE-2025-39902](https://patchblox.com/security/data/cve/CVE-2025-39902.md) | High | mm/slub: avoid accessing metadata when pointer is invalid in object_err() | 7.8 | 0.0017 |  |
| [CVE-2026-64219](https://patchblox.com/security/data/cve/CVE-2026-64219.md) | High | drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async | 7.8 | 0.0017 |  |
| [CVE-2026-17523](https://patchblox.com/security/data/cve/CVE-2026-17523.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: m... | 7.8 | 0.0017 |  |
| [CVE-2026-53329](https://patchblox.com/security/data/cve/CVE-2026-53329.md) | High | drm/amd/display: Use krealloc_array() in dal_vector_reserve() | 7.8 | 0.0015 |  |
| [CVE-2026-63879](https://patchblox.com/security/data/cve/CVE-2026-63879.md) | High | drm/amdgpu: fix amdgpu_hmm_range_get_pages | 7.8 | 0.0014 |  |
| [CVE-2026-53016](https://patchblox.com/security/data/cve/CVE-2026-53016.md) | High | crypto: ccp - copy IV using skcipher ivsize | 7.8 | 0.0014 |  |
| [CVE-2026-43206](https://patchblox.com/security/data/cve/CVE-2026-43206.md) | High | kernel-zfcpdump-devel: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: m... | 7.8 | 0.0014 |  |
| [CVE-2026-53136](https://patchblox.com/security/data/cve/CVE-2026-53136.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: m... | 7.8 | 0.0013 |  |

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Data as of 2026-11-08T00:53:09Z 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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