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RLSA-2026:89082

RLSA-2026:89082 · Important: kernel-rt security, bug fix, and enhancement update

This page contains facts from public vulnerability sources. Check the original advisory before updating.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236) * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388) * kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (CVE-2026-64378) * kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136) * kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338) * kernel: net/iucv: fix use-after-free of a severed iucv_path (CVE-2026-68140) * kernel: net/sched: serialize qdisc_rtab_list against concurrent get/put (CVE-2026-68138) * kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476) * kernel: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() (CVE-2026-72242) * kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586) * kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824) * kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638) * kernel: net/iucv: filter frames in afiucv_hs_rcv() by ingress device (CVE-2026-81003) * kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999) Bug Fix(es) and Enhancement(s): * Backport 6785011f8b16 ("ipv4: validate checksum_start before completing checksum") [rhel-8.10.z] (JIRA:Rocky Linux-280584) For 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.

CVSS 8.8 · High · Fix available

Published
Updated

Stack: system

Affected products and versions

  • kernel-rt Rocky Linux:8

    Affected ranges
    • ECOSYSTEM: < 0:4.18.0-553.178.1.rt7.519.el8_10

    Update to 0:4.18.0-553.178.1.rt7.519.el8_10

Original sources

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