# RHSA-2026:57251: kernel security update

RHSA-2026:57251, released August 21, 2026, fixes 16 CVEs in kernel (version 6.12.0-211.49.1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-57251
- Platform: Linux
- Released: Aug 21, 2026
- Priority: Urgent (Closes CVE-2026-52991, rated Critical)
- CVEs: 16, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:57251

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 10 | 6.12.0-211.49.1.el10_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-52991](https://patchblox.com/security/data/cve/CVE-2026-52991.md) | Urgent | sched/psi: fix race between file release and pressure write | 9.8 | 0.0015 |  |
| [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-2026-46185](https://patchblox.com/security/data/cve/CVE-2026-46185.md) | High | smb/client: fix out-of-bounds read in symlink_data() | 9.1 | 0.0053 |  |
| [CVE-2026-68388](https://patchblox.com/security/data/cve/CVE-2026-68388.md) | High | smb/client: handle overlapping allocated ranges in fallocate | 9.8 | 0.0051 |  |
| [CVE-2026-64560](https://patchblox.com/security/data/cve/CVE-2026-64560.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved:  posix-cpu-timers: Prevent UAF caused by non-lead... | 7.8 | 0.0050 |  |
| [CVE-2026-64379](https://patchblox.com/security/data/cve/CVE-2026-64379.md) | High | smb: client: mask server-provided mode to 07777 in modefromsid | 7.8 | 0.0031 |  |
| [CVE-2026-45878](https://patchblox.com/security/data/cve/CVE-2026-45878.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system.  Security Fix(es):  * kernel: n... | 7.8 | 0.0021 |  |
| [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-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-2026-53143](https://patchblox.com/security/data/cve/CVE-2026-53143.md) | High | drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11 | 7.8 | 0.0015 |  |
| [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-2026-43206](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-2026-53356](https://patchblox.com/security/data/cve/CVE-2026-53356.md) | High | drm/i915/gem: Fix phys BO pread/pwrite with offset | 7.8 | 0.0013 |  |
| [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 |  |
| [CVE-2026-43237](https://patchblox.com/security/data/cve/CVE-2026-43237.md) | High | drm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4 | 7.8 | 0.0012 |  |

---

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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.