{"id":"RLSA-2026:2821","summary":"Moderate: kernel-rt security 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: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)\n\n* kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling (CVE-2023-53762)\n\n* kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information disclosure, or denial of service. (CVE-2025-40304)\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":"2026-02-26T21:30:31.968080Z","published":"2026-02-26T20:43:38.668572Z","upstream":["CVE-2023-53762","CVE-2025-40168","CVE-2025-40304"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:2821"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2414482"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2419838"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2419870"}],"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":"0:4.18.0-553.105.1.rt7.446.el8_10"}],"database_specific":{"yum_repository":"NFV"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:2821.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}