{"id":"RLSA-2026:85774","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: xfrm: espintcp: do not reuse an in-progress partial send (CVE-2026-52935)\n\n* kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)\n\n* kernel: sctp: keep chunk-\u003etransport in step with the list it is queued on (CVE-2026-74588)\n\n* kernel: sctp: validate cookie AUTH state before use (CVE-2026-74752)\n\n* kernel: smb: client: reject a tree connect response whose byte count is too small (CVE-2026-89631)\n\n* kernel: sctp: stop processing a packet once its association is deleted (CVE-2026-89479)\n\n* kernel: perf: Fix addr_filter_ranges lifetime (CVE-2026-93817)\n\n* kernel: netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state (CVE-2026-93288)\n\n* kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation ()\n\n* kernel: netfilter: flowtable: hold reference on ct until flow is released (CVE-2026-98320)\n\nBug Fix(es) and Enhancement(s):\n\n*  gfs2 filesystem withdrawal rework [Rocky Linux-8] (JIRA:Rocky Linux-129363)\n\n* Batch: z-stream xfrm - rhel-8.10.z (NST-Core-26W38) (JIRA:Rocky Linux-256684)\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.","modified":"2026-10-21T07:15:02.257833877Z","published":"2026-10-21T06:38:15.230306Z","upstream":["CVE-2026-52935","CVE-2026-53196","CVE-2026-74588","CVE-2026-74752","CVE-2026-89479","CVE-2026-89631","CVE-2026-93288","CVE-2026-93817","CVE-2026-98320"],"database_specific":{"source_advisory":"RHSA-2026:85774","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:85774"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492098"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492750"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521384"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2524422"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532089"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532290"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540391"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540500"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546494"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:85774"}],"affected":[{"package":{"name":"kernel-rt","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-553.176.1.rt7.517.el8_10"}],"database_specific":{"yum_repository":"NFV"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:85774.json"}}],"schema_version":"1.9.1","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}