{"id":"RLSA-2026:3964","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: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085)\n\n* kernel: macvlan: fix possible UAF in macvlan_forward_source() (CVE-2026-23001)\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":"2026-03-26T12:32:41.149178Z","published":"2026-03-26T12:01:40.953151Z","upstream":["CVE-2025-71085","CVE-2026-23001"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:3964"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2429026"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2432664"}],"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":"0:4.18.0-553.111.1.rt7.452.el8_10"}],"database_specific":{"yum_repository":"NFV"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:3964.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}