# RLSA-2026:57251: kernel security update RLSA-2026:57251, released August 21, 2026, fixes 24 CVEs in kernel (version 0:6.12.0-211.49.1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/rlsa-2026-57251 - Platform: Linux - Released: Aug 21, 2026 - Priority: Urgent (Closes CVE-2026-52991, rated Critical) - CVEs: 24, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://errata.rockylinux.org/RLSA-2026:57251 ## Applies to | Product | Release | Fixed in | |---|---|---| | [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | rocky 10 | 0:6.12.0-211.49.1.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-2026-64017](https://patchblox.com/security/data/cve/CVE-2026-64017.md) | Urgent | blk-mq: pop cached request if it is usable | 9.8 | 0.0013 | | | [CVE-2026-63888](https://patchblox.com/security/data/cve/CVE-2026-63888.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix CRC overread and double-... | 9.8 | 0.0078 | | | [CVE-2026-63886](https://patchblox.com/security/data/cve/CVE-2026-63886.md) | High | kernel-default: Security update for the Linux Kernel | 9.8 | 0.0071 | | | [CVE-2026-43493](https://patchblox.com/security/data/cve/CVE-2026-43493.md) | High | crypto: pcrypt - Fix handling of MAY_BACKLOG requests | 9.8 | 0.0068 | | | [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-2026-64386](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-debug-devel: kernel: drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 | 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 | kernel-zfcpdump: kernel: drm/i915: Fix potential UAF in TTM object purge | 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-core: kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() | 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: kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size | 7.8 | 0.0013 | | | [CVE-2026-63952](https://patchblox.com/security/data/cve/CVE-2026-63952.md) | High | kernel-default: memfd: deny writeable mappings when implying SEAL_WRITE (bsc#1272468). | 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 2026-11-11T01:43:54Z UTC. 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