# RHSA-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. - Web page: https://patchblox.com/security/fix/linux/rhsa-2026-89082 - Platform: Linux - Released: Oct 27, 2026 - Priority: Urgent (Closes CVE-2026-99999, rated Critical) - CVEs: 14, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://access.redhat.com/errata/RHSA-2026:89082 ## Applies to | Product | Release | Fixed in | |---|---|---| | [kernel-rt](https://patchblox.com/security/data/product/linux/kernel-rt.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-core](https://patchblox.com/security/data/product/linux/kernel-rt-core.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-debug](https://patchblox.com/security/data/product/linux/kernel-rt-debug.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-core.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-debug-devel.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-debug-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-debug-kvm.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-devel](https://patchblox.com/security/data/product/linux/kernel-rt-devel.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-kvm.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-modules](https://patchblox.com/security/data/product/linux/kernel-rt-modules.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | | [kernel-rt-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-modules-extra.md) | RHEL 8 | 0:4.18.0-553.178.1.rt7.519.el8_10 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-99999](https://patchblox.com/security/data/cve/CVE-2026-99999.md) | Urgent | ipv4: validate checksum_start before completing checksum | 9.3 | 0.0079 | | | [CVE-2026-68476](https://patchblox.com/security/data/cve/CVE-2026-68476.md) | Urgent | linux: In the Linux kernel, the following vulnerability has been resolved: ipvs: reload ip header after head reallocation... | 9.8 | 0.0071 | | | [CVE-2026-68140](https://patchblox.com/security/data/cve/CVE-2026-68140.md) | Urgent | net/iucv: fix use-after-free of a severed iucv_path | 9.8 | 0.0028 | | | [CVE-2026-72242](https://patchblox.com/security/data/cve/CVE-2026-72242.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: selinux: avoid sk_socket dereference in selinux_... | 8.8 | 0.0070 | | | [CVE-2026-68136](https://patchblox.com/security/data/cve/CVE-2026-68136.md) | High | net: gro: fix double aggregation of flush-marked skbs | 9.8 | 0.0054 | | | [CVE-2026-80586](https://patchblox.com/security/data/cve/CVE-2026-80586.md) | High | mptcp: options: reset DSS fields in case of unexpected size | 9.8 | 0.0040 | | | [CVE-2026-81003](https://patchblox.com/security/data/cve/CVE-2026-81003.md) | High | 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 | | | [CVE-2026-68138](https://patchblox.com/security/data/cve/CVE-2026-68138.md) | High | net/sched: serialize qdisc_rtab_list against concurrent get/put | 8.8 | 0.0022 | | | [CVE-2026-80824](https://patchblox.com/security/data/cve/CVE-2026-80824.md) | High | usb: usbfs: fix use-after-free of usb_device in usbdev_release() | 8.8 | 0.0020 | | | [CVE-2026-89638](https://patchblox.com/security/data/cve/CVE-2026-89638.md) | High | smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions | 8.8 | 0.0018 | | | [CVE-2026-68338](https://patchblox.com/security/data/cve/CVE-2026-68338.md) | High | net/packet: avoid fanout hook re-registration after unregister | 8.8 | 0.0014 | | | [CVE-2026-53388](https://patchblox.com/security/data/cve/CVE-2026-53388.md) | High | fuse: re-lock request before replacing page cache folio | 8.8 | 0.0013 | | | [CVE-2026-53236](https://patchblox.com/security/data/cve/CVE-2026-53236.md) | High | tcp: restrict SO_ATTACH_FILTER to priv users | 8.8 | 0.0013 | | | [CVE-2026-64378](https://patchblox.com/security/data/cve/CVE-2026-64378.md) | High | writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() | 8.8 | 0.0010 | | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo