RHSA-2026:57251: Important: kernel security, bug fix, and enhancement update
The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: drm/amdkfd: Fix out-of-bounds write in kfdeventpageset() (CVE-2026-43206) kernel: drm/amdgpu: Refactor amdgpugemvaioctl for Handling Last Fence Update and Timeline Management v4 (CVE-2026-43237) kernel: crypto: pcrypt - Fix handling of MAYBACKLOG requests (CVE-2026-43493) kernel: udf: fix partition descriptor append bookkeeping (CVE-2026-45991) kernel: drm/amdkfd: Fix watchid bounds checking in debug address watch v2 (CVE-2026-45878) kernel: smb/client: fix out-of-bounds read in symlinkdata() (CVE-2026-46185) kernel: sched/psi: fix race between file release and pressure write (CVE-2026-52991) kernel: drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11 (CVE-2026-53143) kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size (CVE-2026-53136) kernel: drm/amd/display: Use kreallocarray() in dalvectorreserve() (CVE-2026-53329) kernel: drm/i915/gem: Fix phys BO pread/pwrite with offset (CVE-2026-53356) kernel: drm/amdgpu: zero-initialize GART table on allocation (CVE-2026-53374) kernel: drm/i915: Fix potential UAF in TTM object purge (CVE-2026-63884) kernel: scsi: target: iscsi: Validate CHAPR length before base64 decode (CVE-2026-63886) kernel: memfd: deny writeable mappings when implying SEALWRITE (CVE-2026-63952) kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsithandletextcmd() (CVE-2026-63888) kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017) kernel: drm/amdgpu: fix amdgpuhmmrangegetpages (CVE-2026-63879) kernel: drm/amd/display: Validate payload length and linkindex in dcprocessdmubauxtransferasync (CVE-2026-64219) kernel: smb: client: fix double-free in SMB2open() replay (CVE-2026-64382) kernel: smb: client: mask server-provided mode to 07777 in modefromsid (CVE-2026-64379) kernel: smb: client: fix queryinfo() replay double-free (CVE-2026-64386) kernel: posix-cpu-timers: Prevent UAF caused by non-leader exec() race (CVE-2026-64560) kernel: smb/client: handle overlapping allocated ranges in fallocate (CVE-2026-68388) Bug Fix(es) and Enhancement(s): CLONE - RHEL 10.2.z xfs: fix exchange-range reflink flag clearing issue with INO1WRITTEN (JIRA:RHEL-223954) vhost: reset the vring metadata cache on vring reconfiguration [rhel-10.2.z] (JIRA:RHEL-224545) cifs: periodic IO errors when rename races with lease break [rhel-10.2.z] (JIRA:RHEL-235459) cifs: smb1 directory listings from xp server returning EINVAL and EIO [rhel-10.2.z] (JIRA:RHEL-235812) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected Software
Remediation
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.12.0-211.49.1.el10_2 - Upgrade
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kernelto a version that resolves this vulnerability.Patch JIRA:RHEL-235459 - Upgrade
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kernelto a version that resolves this vulnerability.Patch JIRA:RHEL-235812 - Upgrade
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kernelto a version that resolves this vulnerability.Patch JIRA:RHEL-224545 - Upgrade
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kernelto a version that resolves this vulnerability.Patch JIRA:RHEL-223954 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-64017 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-43493 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-53136 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-53329 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-64219 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-43237 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-63879 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-53374 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-53143 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-45878 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-53356 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-63884 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-63952 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-64560 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-52991 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-63888 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-63886 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-46185 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-68388 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-64382 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-64386 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-64379 - Upgrade
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kernelto a version that resolves this vulnerability.Patch CVE-2026-45991 - Upgrade
Upgrade
kernelto a version that resolves this vulnerability.Patch CVE-2026-43206 - Operational
Reboot the system after applying the kernel update so the update (including the changes described in this advisory) takes effect.
Event History
Frequently Asked Questions
Which kernel package variants are included in this update?
The listed affected software includes redhat/kernel, redhat/kernel-rt, redhat/kernel-core, and the corresponding kernel-debug, debuginfo, devel, and devel-matched packages.
Which subsystems are explicitly represented among the listed fixes?
The visible fixes include AMD GPU and KFD components, Intel i915 graphics, cryptographic pcrypt handling, UDF filesystem handling, SMB client symlink processing, and scheduler PSI handling.
Can the provided advisory data determine whether a particular host is affected?
No. The data does not provide affected or fixed package version numbers, hardware requirements, configuration prerequisites, or exploit conditions needed to determine host-level exposure.