{"id":"ALSA-2026:55765","summary":"Important: kernel-rt security, bug fix, and enhancement update","details":"The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.  \n\nSecurity Fix(es):  \n\n  * kernel: mm/slub: avoid accessing metadata when pointer is invalid in object_err() (CVE-2025-39902)\n  * kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() (CVE-2026-43206)\n  * kernel: crypto: ccp - copy IV using skcipher ivsize (CVE-2026-53016)\n  * kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size (CVE-2026-53136)\n  * kernel: drm/amd/display: Use krealloc_array() in dal_vector_reserve() (CVE-2026-53329)\n  * kernel: drm/amdgpu: zero-initialize GART table on allocation (CVE-2026-53374)\n  * kernel: drm/i915: Fix potential UAF in TTM object purge (CVE-2026-63884)\n  * kernel: drm/amdgpu: fix amdgpu_hmm_range_get_pages (CVE-2026-63879)\n  * kernel: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async (CVE-2026-64219)\n  * kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges (CVE-2026-17523)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * Backport \"sched/deadline: Fix bandwidth reclaim equation in GRUB\" to AlmaLinux 8.10 (JIRA:AlmaLinux-189997)\n  * vhost: reset the vring metadata cache on vring reconfiguration [almalinux-8.10.z] (JIRA:AlmaLinux-224556)\n\n\nFor 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.\n","modified":"2026-08-18T11:27:25.233812041Z","published":"2026-08-17T00:00:00Z","related":["CVE-2025-39902","CVE-2026-17523","CVE-2026-43206","CVE-2026-53016","CVE-2026-53136","CVE-2026-53329","CVE-2026-53374","CVE-2026-63879","CVE-2026-63884","CVE-2026-64219"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:55765"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2025-39902"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-17523"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-43206"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-53016"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-53136"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-53329"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-53374"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-63879"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-63884"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-64219"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2400594"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2467156"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2492269"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2492768"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2495941"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2502188"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2502321"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2502463"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2506790"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2507407"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-55765.html"}],"affected":[{"package":{"name":"kernel-rt","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-core","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-debug","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-debug-core","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-debug-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-debug-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-debug-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-debug-modules","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-debug-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-debug-modules-extra","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-debug-modules-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:55765.json"}},{"package":{"name":"kernel-rt-modules","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.156.1.rt7.497.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almali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