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ALSA-2026:55764 — Important: kernel security, bug fix, and enhancement update

Affected: AlmaLinux:8: bpftool, AlmaLinux:8: kernel, AlmaLinux:8: kernel-abi-stablelists, AlmaLinux:8: kernel-core, AlmaLinux:8: kernel-cross-headers, AlmaLinux:8: kernel-debug, AlmaLinux:8: kernel-debug-core, AlmaLinux:8: kernel-debug-devel, AlmaLinux:8: kernel-debug-modules, AlmaLinux:8: kernel-debug-modules-extra and 15 more

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: mm/slub: avoid accessing metadata when pointer is invalid in object_err() (CVE-2025-39902) * kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() (CVE-2026-43206) * kernel: crypto: ccp - copy IV using skcipher ivsize (CVE-2026-53016) * 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/amdgpu: zero-initialize GART table on allocation (CVE-2026-53374) * kernel: drm/i915: Fix potential UAF in TTM object purge (CVE-2026-63884) * 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: can:bcm: arbitrary kernel code execution leading to escalate privileges (CVE-2026-17523)

Bug Fix(es) and Enhancement(s):

* Backport "sched/deadline: Fix bandwidth reclaim equation in GRUB" to AlmaLinux 8.10 (JIRA:AlmaLinux-189997) * vhost: reset the vring metadata cache on vring reconfiguration [almalinux-8.10.z] (JIRA:AlmaLinux-224556)

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.

bdu:2026-14329

BELL-CVE-2026-53374

Affected: Alpaquita:23: linux-lts, Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

certfr-2026-avi-0926 — De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un a…

certfr-2026-avi-0926

EUVD-2026-348244

fkie_cve-2026-53374

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: zero-initialize GART table on allocation

GART TLB is flushed after unmapping but not after mapping. Since amdgpu_bo_create_kernel() does not zero-initialize the buffer, when a single PTE is written the TLB may speculatively load other uninitialized entries from the same cacheline. Those garbage entries can appear valid, and a subsequent write to another PTE in the same cacheline may cause the GPU to use a stale garbage PTE from the TLB.

Fix this by calling memset_io() to zero-initialize the GART table with gart_pte_flags immediately after allocation.

Using AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work since SDMA needs GART to be initialized to work.

(cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)

GHSA-45w5-677j-gmrq

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: zero-initialize GART table on allocation

Fix this by calling memset_io() to zero-initialize the GART table with gart_pte_flags immediately after allocation.

Using AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work since SDMA needs GART to be initialized to work.

(cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)

msrc_CVE-2026-53374 — drm/amdgpu: zero-initialize GART table on allocation

msrc_CVE-2026-53374

openSUSE-SU-2026:21555-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

RHSA-2026:55764 — Red Hat Security Advisory: kernel security, bug fix, and enhancement update

kernel: mm/slub: avoid accessing metadata when pointer is invalid in object_err() kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() kernel: crypto: ccp - copy IV using skcipher ivsize kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size kernel: drm/amd/display: Use krealloc_array() in dal_vector_reserve() kernel: drm/amdgpu: zero-initialize GART table on allocation kernel: drm/amdgpu: fix amdgpu_hmm_range_get_pages kernel: drm/i915: Fix potential UAF in TTM object purge kernel: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async

RLSA-2026:55764 — Important: kernel security, bug fix, and enhancement update

Affected: Rocky Linux:8: kernel

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: mm/slub: avoid accessing metadata when pointer is invalid in object_err() (CVE-2025-39902)

* kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() (CVE-2026-43206)

* kernel: crypto: ccp - copy IV using skcipher ivsize (CVE-2026-53016)

* 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/amdgpu: zero-initialize GART table on allocation (CVE-2026-53374)

* kernel: drm/i915: Fix potential UAF in TTM object purge (CVE-2026-63884)

* 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: can:bcm: arbitrary kernel code execution leading to escalate privileges (CVE-2026-17523)

Bug Fix(es) and Enhancement(s):

* Backport "sched/deadline: Fix bandwidth reclaim equation in GRUB" to Rocky Linux 8.10 (JIRA:Rocky Linux-189997)

* vhost: reset the vring metadata cache on vring reconfiguration [rhel-8.10.z] (JIRA:Rocky Linux-224556)

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.

SUSE-SU-2026:23066-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2026-53374

Affected: Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-aws, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe, Ubuntu:16.04:LTS: linux-hwe-edge and 243 more

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: zero-initialize GART table on allocation GART TLB is flushed after unmapping but not after mapping. Since amdgpu_bo_create_kernel() does not zero-initialize the buffer, when a single PTE is written the TLB may speculatively load other uninitialized entries from the same cacheline. Those garbage entries can appear valid, and a subsequent write to another PTE in the same cacheline may cause the GPU to use a stale garbage PTE from the TLB. Fix this by calling memset_io() to zero-initialize the GART table with gart_pte_flags immediately after allocation. Using AMDGPU_GEM_CREATE_VRAM_CLEARED, SDMA-based clear will not work since SDMA needs GART to be initialized to work. (cherry picked from commit d9af8263b82b6eaa60c5718e0c6631c5037e4b24)

WID-SEC-W-2026-2403 — Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, möglicherweise Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen oder vertrauliche Informationen offenzulegen.