{"id":"RLSA-2026:75746","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: Linux kernel: Use-after-free in xc5000 tuner driver due to race condition (CVE-2025-39994)\n\n* kernel: gfs2: Fix unlikely race in gdlm_put_lock (CVE-2025-40242)\n\n* kernel: Linux kernel: Denial of Service in RDMA/bnxt_re driver due to race condition during QP destruction (CVE-2023-54048)\n\n* kernel: nvme-pci: fix mempool alloc size (CVE-2022-50756)\n\n* kernel: Linux kernel: Denial of Service in QFQ scheduler via child qlen manipulation (CVE-2026-23105)\n\n* kernel: RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send (CVE-2026-45856)\n\n* kernel: gfs2: Fix slab-use-after-free in qd_put (CVE-2026-45861)\n\n* kernel: net/sched: act_ct: Only release RCU read lock after ct_ft (CVE-2026-46319)\n\n* kernel: gfs2: add some missing log locking (CVE-2026-53049)\n\n* kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)\n\n* kernel: net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list (CVE-2026-53230)\n\n* kernel: ipvs: clear the svc scheduler ptr early on edit (CVE-2026-53270)\n\n* kernel: net: ip_gre: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-63829)\n\n* kernel: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path (CVE-2026-63794)\n\n* kernel: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() (CVE-2026-63992)\n\n* kernel: tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() (CVE-2026-63994)\n\n* kernel: vxlan: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-68432)\n\n* kernel: net: ip6_gre: require CAP_NET_ADMIN in the device netns for changelink (CVE-2026-72052)\n\n* kernel: netfilter: nf_queue: pin bridge device while NFQUEUE holds fake dst (CVE-2026-72255)\n\n* kernel: KVM: SVM: Update x2APIC MSR intercepts if AVIC is inhibited while L2 is active (CVE-2026-74516)\n\n* kernel: netfilter: nf_conntrack_sip: widen NAT rewrite delta to s32 in sip_help_tcp() (CVE-2026-74569)\n\n* kernel: ipvs: clear IPv4 options after rebasing tunnel ICMP errors (CVE-2026-74669)\n\n* kernel: ipvlan: inherit needed_headroom and needed_tailroom from phy_dev (CVE-2026-74744)\n\n* kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746)\n\n* kernel: KVM: s390: vsie: zero stale crypto bits (CVE-2026-80921)\n\n* kernel: nvme-tcp: fix host memory disclosure on R2T for a read command (CVE-2026-89481)\n\n* kernel: nvme: add missing SRCU grace period in error path (CVE-2026-89972)\n\n* kernel: nvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed() (CVE-2026-90227)\n\n* kernel: netfilter: nf_conntrack: use get_unaligned_be32() in tcp_sack() (CVE-2026-97417)\n\nBug Fix(es) and Enhancement(s):\n\n* Rocky Linux8.10 - s390/vfio_ccw: Error path cleanups (JIRA:Rocky Linux-252194)\n\n* Rocky Linux8.10 - s390/topology: Use zero-based numbering (JIRA:Rocky Linux-252199)\n\n* [nfs rhel8.10] Disable async copy on nfsd side (JIRA:Rocky Linux-266661)\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":"2026-10-06T06:45:02.559355042Z","published":"2026-10-06T06:02:31.784980Z","upstream":["CVE-2022-50756","CVE-2023-54048","CVE-2025-39994","CVE-2025-40242","CVE-2026-23105","CVE-2026-45856","CVE-2026-45861","CVE-2026-46319","CVE-2026-52972","CVE-2026-53049","CVE-2026-53230","CVE-2026-53270","CVE-2026-63794","CVE-2026-63829","CVE-2026-63992","CVE-2026-63994","CVE-2026-68432","CVE-2026-72052","CVE-2026-72255","CVE-2026-74516","CVE-2026-74569","CVE-2026-74669","CVE-2026-74744","CVE-2026-74746","CVE-2026-80921","CVE-2026-89481","CVE-2026-89972","CVE-2026-90227","CVE-2026-97417"],"database_specific":{"license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:75746"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:75746"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2404123"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2418819"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2425013"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2425209"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2436789"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482129"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2482143"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2486979"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492276"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492364"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492728"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492853"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502230"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502241"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502431"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502444"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2514441"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516306"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516717"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516998"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2517052"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521375"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2524431"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2524483"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531066"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532184"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535140"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536346"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540479"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:75746"}],"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":"0:4.18.0-553.171.1.rt7.512.el8_10"}],"database_specific":{"yum_repository":"NFV"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:75746.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}