RHSA-2026:64775HighCVSS 7.8

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Published
September 8, 2026
Last Modified
September 9, 2026

🔗 CVE IDs covered (22)

CVE-2026-64287 →CVE-2026-46306 →CVE-2026-53223 →CVE-2026-64265 →CVE-2026-64563 →CVE-2026-64597 →CVE-2026-53075 →CVE-2026-53277 →CVE-2026-64319 →CVE-2026-23442 →CVE-2026-46015 →CVE-2026-46266 →CVE-2026-52933 →CVE-2026-63993 →CVE-2026-64002 →CVE-2025-38004 →CVE-2026-31503 →CVE-2026-43339 →CVE-2026-53228 →CVE-2026-53235 →CVE-2026-53259 →CVE-2026-53275 →

📋 Description

CVE-2025-38004 — kernel: can: bcm: add locking for bcm_op runtime updates CVE-2026-23442 — kernel: ipv6: add NULL checks for idev in SRv6 paths CVE-2026-31503 — kernel: udp: Fix wildcard bind conflict check when using hash2 CVE-2026-43339 — kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() CVE-2026-46015 — kernel: tcp: call sk_data_ready() after listener migration CVE-2026-46266 — kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP CVE-2026-46306 — kernel: flow_dissector: do not dissect PPPoE PFC frames CVE-2026-52933 — kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership() CVE-2026-53075 — kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls CVE-2026-53223 — kernel: net: guard timestamp cmsgs to real error queue skbs CVE-2026-53228 — kernel: ipv6: sit: reload inner IPv6 header after GSO offloads CVE-2026-53235 — kernel: net: add pskb_may_pull() to skb_gro_receive_list() CVE-2026-53259 — kernel: ipv6: anycast: insert aca into global hash under idev->lock CVE-2026-53275 — kernel: ipv6: mcast: Fix use-after-free when processing MLD queries CVE-2026-53277 — kernel: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation CVE-2026-63993 — kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() CVE-2026-64002 — kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() CVE-2026-64265 — kernel: fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req CVE-2026-64287 — kernel: KVM: arm64: Bound used_lrs when flushing the pKVM hyp vCPU CVE-2026-64319 — kernel: nvmet-auth: validate reply message payload bounds against transfer length CVE-2026-64563 — kernel: rhashtable: clear stale iter->p on table restart CVE-2026-64597 — kernel: smb: client: fix double-free in SMB2_close() replay

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • Red Hat Enterprise Linux Real Time (v. 10)
  • Red Hat Enterprise Linux Real Time for NFV (v. 10)
  • kernel-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.52.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.52.1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.52.1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.52.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-core-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-core-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-debug-devel-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-devel-matched-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-modules-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-core-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-extra-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-devel-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-devel-matched-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-modules-0:6.12.0-211.52.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • +170 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: To mitigate this issue, the `fuse` kernel module can be blacklisted to prevent its loading. This action will disable the functionality of FUSE filesystems, which may affect applications that rely on them. To blacklist the module, create `/etc/modprobe.d/blacklist-fuse.conf` with `blacklist fuse`, then regenerate the initramfs using `dracut -f -v` and reboot the system. This change requires a system reboot to take effect and may impact system functionality if FUSE is in use. Workaround: If SMB/CIFS client functionality is not required, the 'cifs' kernel module can be blocklisted to prevent it from loading. Systems that do not mount SMB/CIFS shares are not affected. For systems that require SMB client access, ensure connections are only made to trusted SMB servers.

🔗 References (26)