Kernel Security Update — AlmaLinux 9 (ALSA-2026:57252)

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

Security Fix(es):  

  * kernel: netfilter: nf_conntrack_h323: fix OOB read in decode_choice() (CVE-2026-43233)
  * 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: 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: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)
  * 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: mm/huge_memory: update file PMD counter before folio_put() (CVE-2026-53189)
  * 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: netfilter: synproxy: refresh tcphdr after skb_ensure_writable (CVE-2026-64007)
  * 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: drm/amdgpu: fix amdgpu_hmm_range_get_pages (CVE-2026-63879)
  * kernel: net/smc: reject CHID-0 ACCEPT that matches an empty ism_dev slot (CVE-2026-64048)
  * 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: validate DFS referral PathConsumed (CVE-2026-68343)
  * kernel: smb/client: handle overlapping allocated ranges in fallocate (CVE-2026-68388)


Bug Fix(es) and Enhancement(s):  

  * kernel 5.14.0-687.5.1.el9_8 breaks wifi when using FIPS (JIRA:AlmaLinux-181065)
  * vhost: reset the vring metadata cache on vring reconfiguration [almalinux-9.8.z] (JIRA:AlmaLinux-224549)
  * cifs: smb1 directory listings from xp server returning EINVAL and EIO [almalinux-9.8.z] (JIRA:AlmaLinux-235811)


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.