Issued:: 2026-08-20
Updated:: 2026-08-20

RHSA-2026:57251 - Important: kernel security, bug fix, and enhancement update

Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory: Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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 kfd_event_page_set() (CVE-2026-43206)
kernel: drm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4 (CVE-2026-43237)
kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)
kernel: udf: fix partition descriptor append bookkeeping (CVE-2026-45991)
kernel: drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 (CVE-2026-45878)
kernel: smb/client: fix out-of-bounds read in symlink_data() (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 krealloc_array() in dal_vector_reserve() (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 CHAP_R length before base64 decode (CVE-2026-63886)
kernel: memfd: deny writeable mappings when implying SEAL_WRITE (CVE-2026-63952)
kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888)
kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017)
kernel: drm/amdgpu: fix amdgpu_hmm_range_get_pages (CVE-2026-63879)
kernel: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async (CVE-2026-64219)
kernel: smb: client: fix double-free in SMB2_open() replay (CVE-2026-64382)
kernel: smb: client: mask server-provided mode to 07777 in modefromsid (CVE-2026-64379)
kernel: smb: client: fix query_info() 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 INO1_WRITTEN (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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Affected Products

Product	Version	Arch
Red Hat Enterprise Linux for x86_64	10	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support	10.2	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle	10.2	x86_64
Red Hat Enterprise Linux for x86_64 - 4 years of updates	10.2	x86_64
Red Hat Enterprise Linux for Power, little endian	10	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support	10.2	ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle	10.2	ppc64le
Red Hat Enterprise Linux for Power, little endian - 4 years of support	10.2	ppc64le
Red Hat Enterprise Linux for IBM z Systems	10	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support	10.2	s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle	10.2	s390x
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates	10.2	s390x
Red Hat Enterprise Linux for ARM 64	10	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support	10.2	aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle	10.2	aarch64
Red Hat Enterprise Linux for ARM 64 - 4 years of updates	10.2	aarch64
Red Hat CodeReady Linux Builder for x86_64	10	x86_64
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support	10.2	x86_64
Red Hat CodeReady Linux Builder for Power, little endian	10	ppc64le
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support	10.2	ppc64le
Red Hat CodeReady Linux Builder for IBM z Systems	10	s390x
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support	10.2	s390x
Red Hat CodeReady Linux Builder for ARM 64	10	aarch64
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support	10.2	aarch64

Updated Packages

kernel-tools-libs-devel-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-64k-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
libperf-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-64k-devel-matched-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-6.12.0-211.49.1.el10_2.aarch64.rpm
libperf-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-debug-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
python3-perf-6.12.0-211.49.1.el10_2.ppc64le.rpm
perf-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-zfcpdump-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debug-debuginfo-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-rt-64k-debug-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-zfcpdump-6.12.0-211.49.1.el10_2.s390x.rpm
libperf-debuginfo-6.12.0-211.49.1.el10_2.ppc64le.rpm
perf-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-tools-libs-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-uki-virt-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-headers-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-modules-extra-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-zfcpdump-modules-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-debug-devel-6.12.0-211.49.1.el10_2.x86_64.rpm
libperf-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-devel-matched-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debuginfo-common-aarch64-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-modules-extra-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debuginfo-common-x86_64-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-modules-extra-matched-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-64k-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-devel-matched-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-cross-headers-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-debug-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-devel-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-modules-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-tools-debuginfo-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-tools-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
python3-perf-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-64k-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-64k-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-modules-core-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-devel-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-tools-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-modules-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-64k-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-tools-6.12.0-211.49.1.el10_2.s390x.rpm
perf-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
python3-perf-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-modules-extra-matched-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-devel-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-modules-extra-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-devel-matched-6.12.0-211.49.1.el10_2.s390x.rpm
rtla-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-64k-debug-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-modules-extra-6.12.0-211.49.1.el10_2.x86_64.rpm
libperf-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-modules-extra-matched-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-64k-debug-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-modules-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debuginfo-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-64k-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-64k-debug-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debug-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-tools-libs-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-debug-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-core-6.12.0-211.49.1.el10_2.aarch64.rpm
perf-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-tools-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-debug-devel-matched-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-cross-headers-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-headers-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-debug-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-modules-core-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-modules-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-cross-headers-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-rt-debug-modules-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-debug-modules-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-zfcpdump-core-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-zfcpdump-devel-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-modules-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-zfcpdump-devel-matched-6.12.0-211.49.1.el10_2.s390x.rpm
libperf-debuginfo-6.12.0-211.49.1.el10_2.s390x.rpm
perf-debuginfo-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-devel-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-rt-64k-debug-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-debug-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-64k-debug-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-headers-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-tools-libs-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debug-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-tools-libs-devel-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-devel-matched-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-6.12.0-211.49.1.el10_2.src.rpm
rtla-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
rtla-6.12.0-211.49.1.el10_2.x86_64.rpm
rv-6.12.0-211.49.1.el10_2.x86_64.rpm
libperf-6.12.0-211.49.1.el10_2.x86_64.rpm
python3-perf-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
rv-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-uki-virt-addons-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-modules-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-modules-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-64k-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
python3-perf-6.12.0-211.49.1.el10_2.x86_64.rpm
rtla-6.12.0-211.49.1.el10_2.ppc64le.rpm
rv-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-devel-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-core-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-modules-extra-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-modules-extra-matched-6.12.0-211.49.1.el10_2.aarch64.rpm
perf-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
python3-perf-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-modules-core-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-debug-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-debug-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-cross-headers-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debug-devel-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-zfcpdump-modules-core-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-64k-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-64k-debug-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-core-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-core-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-rt-64k-debug-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-debug-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-modules-extra-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-core-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-uki-virt-addons-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-devel-matched-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-modules-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debug-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-64k-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-modules-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-debug-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-64k-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debug-modules-extra-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-uki-virt-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-tools-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-64k-debug-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-64k-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-devel-matched-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-tools-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-modules-extra-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-64k-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
libperf-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-headers-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-debug-modules-core-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-rt-64k-debug-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-tools-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-devel-matched-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-doc-6.12.0-211.49.1.el10_2.noarch.rpm
kernel-modules-extra-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-debug-debuginfo-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-devel-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
python3-perf-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-devel-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-core-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-rt-debug-6.12.0-211.49.1.el10_2.aarch64.rpm
perf-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debuginfo-common-ppc64le-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-zfcpdump-modules-extra-6.12.0-211.49.1.el10_2.s390x.rpm
perf-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-abi-stablelists-6.12.0-211.49.1.el10_2.noarch.rpm
rv-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-debuginfo-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-rt-modules-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-tools-libs-6.12.0-211.49.1.el10_2.x86_64.rpm
kernel-debug-modules-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-rt-64k-core-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debug-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debug-modules-core-6.12.0-211.49.1.el10_2.aarch64.rpm
python3-perf-debuginfo-6.12.0-211.49.1.el10_2.ppc64le.rpm
kernel-uki-virt-6.12.0-211.49.1.el10_2.aarch64.rpm
kernel-debuginfo-common-s390x-6.12.0-211.49.1.el10_2.s390x.rpm
kernel-debug-devel-matched-6.12.0-211.49.1.el10_2.s390x.rpm

Fixes

CVEs

References

https://access.redhat.com/security/updates/classification/#important

Additional information

The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at Security Contacts and Procedures.
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