Linux · 
Red Hat · Security advisory · October 27, 2026
Red Hat · Security advisory · October 27, 2026RHSA-2026:89082: Security update for 12 packages
RHSA-2026:89082, released October 27, 2026, fixes 14 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
14
3 rated Critical
Exploited
0
None reported
Highest CVSS
9.8
Base score, 0 to 10
Highest EPSS
0.0079
56th percentile
Priority of the 14 CVEs
Patch now 0
Urgent 3
High 11
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| kernel-rt | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-core | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-debug | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-debug-core | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-debug-devel | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-debug-kvm | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-debug-modules | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-debug-modules-extra | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-devel | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-kvm | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-modules | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
| kernel-rt-modules-extra | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-99999 | ipv4: validate checksum_start before completing checksum | 9.3 | 0.0079 | None reported |
| Urgent | CVE-2026-68476 | linux: In the Linux kernel, the following vulnerability has been resolved: ipvs: reload ip header after head reallocation... | 9.8 | 0.0071 | None reported |
| Urgent | CVE-2026-68140 | net/iucv: fix use-after-free of a severed iucv_path | 9.8 | 0.0028 | None reported |
| High | CVE-2026-72242 | linux: In the Linux kernel, the following vulnerability has been resolved: selinux: avoid sk_socket dereference in selinux_... | 8.8 | 0.0070 | None reported |
| High | CVE-2026-68136 | net: gro: fix double aggregation of flush-marked skbs | 9.8 | 0.0054 | None reported |
| High | CVE-2026-80586 | mptcp: options: reset DSS fields in case of unexpected size | 9.8 | 0.0040 | None reported |
| High | CVE-2026-81003 | linux: In the Linux kernel, the following vulnerability has been resolved: net/iucv: filter frames in afiucv_hs_rcv() by in... | 8.8 | 0.0031 | None reported |
| High | CVE-2026-68138 | net/sched: serialize qdisc_rtab_list against concurrent get/put | 8.8 | 0.0022 | None reported |
| High | CVE-2026-80824 | usb: usbfs: fix use-after-free of usb_device in usbdev_release() | 8.8 | 0.0020 | None reported |
| High | CVE-2026-89638 | smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions | 8.8 | 0.0018 | None reported |
| High | CVE-2026-68338 | net/packet: avoid fanout hook re-registration after unregister | 8.8 | 0.0014 | None reported |
| High | CVE-2026-53388 | fuse: re-lock request before replacing page cache folio | 8.8 | 0.0013 | None reported |
| High | CVE-2026-53236 | tcp: restrict SO_ATTACH_FILTER to priv users | 8.8 | 0.0013 | None reported |
| High | CVE-2026-64378 | writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() | 8.8 | 0.0010 | None reported |
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