{"id":"ALSA-2026:89082","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: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236)\n  * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388)\n  * kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (CVE-2026-64378)\n  * kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136)\n  * kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338)\n  * kernel: net/iucv: fix use-after-free of a severed iucv_path (CVE-2026-68140)\n  * kernel: net/sched: serialize qdisc_rtab_list against concurrent get/put (CVE-2026-68138)\n  * kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476)\n  * kernel: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() (CVE-2026-72242)\n  * kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586)\n  * kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824)\n  * kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638)\n  * kernel: net/iucv: filter frames in afiucv_hs_rcv() by ingress device (CVE-2026-81003)\n  * kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * Backport 6785011f8b16 (\"ipv4: validate checksum_start before completing checksum\") [almalinux-8.10.z] (JIRA:AlmaLinux-280584)\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":"2026-10-26T20:56:56.070038251Z","published":"2026-10-24T00:00:00Z","related":["CVE-2026-53236","CVE-2026-53388","CVE-2026-64378","CVE-2026-68136","CVE-2026-68138","CVE-2026-68140","CVE-2026-68338","CVE-2026-68476","CVE-2026-72242","CVE-2026-80586","CVE-2026-80824","CVE-2026-81003","CVE-2026-89638","CVE-2026-99999"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:89082"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-53236"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-53388"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-64378"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-68136"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-68138"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-68140"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-68338"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-68476"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-72242"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-80586"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-80824"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-81003"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-89638"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-99999"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2492709"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2502255"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2507296"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2513163"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2513264"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2513293"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2513343"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2516417"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2524438"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2528642"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2532122"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2532515"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2553429"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-89082.html"}],"affected":[{"package":{"name":"kernel-rt","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.json"}},{"package":{"name":"kernel-rt-core","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.json"}},{"package":{"name":"kernel-rt-debug","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.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":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.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":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.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":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.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":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.json"}},{"package":{"name":"kernel-rt-devel","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.json"}},{"package":{"name":"kernel-rt-modules","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.json"}},{"package":{"name":"kernel-rt-modules-extra","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/kernel-rt-modules-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-553.178.1.rt7.519.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:89082.json"}}],"schema_version":"1.9.0"}