# RLSA-2026:57252: kernel security update RLSA-2026:57252, released August 21, 2026, fixes 26 CVEs in kernel (version 0:5.14.0-687.41.1.el9_8). None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/rlsa-2026-57252 - Platform: Linux - Released: Aug 21, 2026 - Priority: Urgent (Closes CVE-2026-52991, rated Critical) - CVEs: 26, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://errata.rockylinux.org/RLSA-2026:57252 ## Applies to | Product | Release | Fixed in | |---|---|---| | [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | rocky 9 | 0:5.14.0-687.41.1.el9_8 | ## 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-2026-63888](https://patchblox.com/security/data/cve/CVE-2026-63888.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 9.8 | 0.0078 | | | [CVE-2026-64007](https://patchblox.com/security/data/cve/CVE-2026-64007.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 9.8 | 0.0051 | | | [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-2026-68343](https://patchblox.com/security/data/cve/CVE-2026-68343.md) | High | smb: client: validate DFS referral PathConsumed | 9.1 | 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-2026-64048](https://patchblox.com/security/data/cve/CVE-2026-64048.md) | High | python3-perf: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 7.8 | 0.0050 | | | [CVE-2026-43233](https://patchblox.com/security/data/cve/CVE-2026-43233.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.2 | 0.0046 | | | [CVE-2026-64386](https://patchblox.com/security/data/cve/CVE-2026-64386.md) | High | smb: client: fix query_info() replay double-free | 9.8 | 0.0046 | | | [CVE-2026-64382](https://patchblox.com/security/data/cve/CVE-2026-64382.md) | High | smb: client: fix double-free in SMB2_open() replay | 8.8 | 0.0035 | | | [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-2026-45991](https://patchblox.com/security/data/cve/CVE-2026-45991.md) | High | udf: fix partition descriptor append bookkeeping | 7.8 | 0.0018 | | | [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-2026-53189](https://patchblox.com/security/data/cve/CVE-2026-53189.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.8 | 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-2026-46120](https://patchblox.com/security/data/cve/CVE-2026-46120.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.8 | 0.0013 | | | [CVE-2026-63952](https://patchblox.com/security/data/cve/CVE-2026-63952.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.4 | 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. 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