{"id":"RLSA-2026:68532","summary":"Important: 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: ipvlan: Make the addrs_lock be per port (CVE-2026-23103)\n\n* kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)\n\n* kernel: netfilter: nf_conntrack_h323: fix OOB read in decode_choice() (CVE-2026-43233)\n\n* kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339)\n\n* kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266)\n\n* kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306)\n\n* kernel: netfilter: xt_policy: fix strict mode inbound policy matching (CVE-2026-52920)\n\n* kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls (CVE-2026-53075)\n\n* kernel: ipv6: sit: reload inner IPv6 header after GSO offloads (CVE-2026-53228)\n\n* kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN (CVE-2026-53176)\n\n* kernel: netfilter: require Ethernet MAC header before using eth_hdr() (CVE-2026-53131)\n\n* kernel: netfilter: conntrack_irc: fix possible out-of-bounds read (CVE-2026-53268)\n\n* kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)\n\n* kernel: ALSA: timer: Fix UAF at snd_timer_user_params() (CVE-2026-53192)\n\n* kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223)\n\n* kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275)\n\n* kernel: ipv4: free net-\u003eipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002)\n\n* kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921)\n\n* kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919)\n\n* kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917)\n\n* kernel: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change (CVE-2026-68143)\n\n* kernel: xfrm: fix stale skb-\u003eprev after async crypto steals a GSO segment (CVE-2026-68426)\n\n* kernel: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post() (CVE-2026-72298)\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":"2026-09-19T06:30:02.626780587Z","published":"2026-09-19T06:02:23.579834Z","upstream":["CVE-2026-23103","CVE-2026-31663","CVE-2026-43233","CVE-2026-43339","CVE-2026-46266","CVE-2026-46306","CVE-2026-52920","CVE-2026-53075","CVE-2026-53131","CVE-2026-53176","CVE-2026-53192","CVE-2026-53223","CVE-2026-53228","CVE-2026-53239","CVE-2026-53268","CVE-2026-53275","CVE-2026-63917","CVE-2026-63919","CVE-2026-63921","CVE-2026-64002","CVE-2026-68143","CVE-2026-68426","CVE-2026-72298"],"database_specific":{"source_advisory":"RHSA-2026:68532","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:68532"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2436771"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2461462"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467135"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2468102"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2484456"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2486463"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492112"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492295"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492733"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492741"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492747"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492770"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492779"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492792"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492811"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492841"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502363"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502368"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502412"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502434"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513218"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2513477"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516599"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:68532"}],"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":"0:4.18.0-553.164.1.rt7.505.el8_10"}],"database_specific":{"yum_repository":"NFV"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:68532.json"}}],"schema_version":"1.9.0","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"}]}