RLSA-2026:66180

Dashboard / Vulnerabilities / RLSA-2026:66180

RLSA-2026:66180

Summary: Important: kernel security, bug fix, and enhancement update

Details: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133) * kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339) * kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493) * kernel: tcp: call sk_data_ready() after listener migration (CVE-2026-46015) * kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149) * kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266) * kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306) * kernel: Revert "net/smc: Introduce TCP ULP support" (CVE-2026-46330) * kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002) * kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223) * kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275) * kernel: ipv4: account for fraggap on the paged allocation path (CVE-2026-53366) * kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034) * kernel: rhashtable: clear stale iter->p on table restart (CVE-2026-64563) * kernel: smb: client: fix double-free in SMB2_close() replay (CVE-2026-64597) * kernel: nvmet-rdma: handle inline data with a nonzero offset (CVE-2026-72129) * kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480) Bug Fix(es) and Enhancement(s): * KSM to deduplicate only zero pages [rhel-9.8.z] (JIRA:Rocky Linux-249161) 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.

References: https://errata.rockylinux.org/RLSA-2026:66180, https://bugzilla.redhat.com/show_bug.cgi?id=2467065, https://bugzilla.redhat.com/show_bug.cgi?id=2468102, https://bugzilla.redhat.com/show_bug.cgi?id=2479812, https://bugzilla.redhat.com/show_bug.cgi?id=2481936, https://bugzilla.redhat.com/show_bug.cgi?id=2482566, https://bugzilla.redhat.com/show_bug.cgi?id=2484456, https://bugzilla.redhat.com/show_bug.cgi?id=2486463, https://bugzilla.redhat.com/show_bug.cgi?id=2486999, https://bugzilla.redhat.com/show_bug.cgi?id=2492329, https://bugzilla.redhat.com/show_bug.cgi?id=2492811, https://bugzilla.redhat.com/show_bug.cgi?id=2492841, https://bugzilla.redhat.com/show_bug.cgi?id=2501252, https://bugzilla.redhat.com/show_bug.cgi?id=2502394, https://bugzilla.redhat.com/show_bug.cgi?id=2510892, https://bugzilla.redhat.com/show_bug.cgi?id=2511932, https://bugzilla.redhat.com/show_bug.cgi?id=2516731, https://bugzilla.redhat.com/show_bug.cgi?id=2517046, https://access.redhat.com/errata/RHSA-2026:66180