RHSA-2026:72629HighCVSS 7.8

Red Hat Security Advisory: kpatch-patch-4_18_0-553_109_1, kpatch-patch-4_18_0-553_125_1, kpatch-patch-4_18_0-553_158_1, kpatch-patch-4_18_0-553_72_1, and kpatch-patch-4_18_0-553_85_1 security update

Published
September 28, 2026
Last Modified
September 28, 2026

🔗 CVE IDs covered (4)

CVE-2026-46145 →CVE-2026-46189 →CVE-2026-74581 →CVE-2026-45852 →

📋 Description

CVE-2026-45852 — kernel: RDMA/rxe: Fix double free in rxe_srq_from_init CVE-2026-46145 — kernel: RDMA/mana: Validate rx_hash_key_len CVE-2026-46189 — kernel: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path CVE-2026-74581 — kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer

🎯 Affected products36

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-12.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-12.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-0:1-12.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debuginfo-0:1-12.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debuginfo-0:1-12.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debugsource-0:1-12.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_109_1-debugsource-0:1-12.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-9.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-9.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-0:1-9.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debuginfo-0:1-9.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debuginfo-0:1-9.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debugsource-0:1-9.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_125_1-debugsource-0:1-9.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-0:1-1.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-0:1-1.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-0:1-1.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debuginfo-0:1-1.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debuginfo-0:1-1.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debugsource-0:1-1.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_158_1-debugsource-0:1-1.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-16.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-16.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-0:1-16.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debuginfo-0:1-16.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debuginfo-0:1-16.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debugsource-0:1-16.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_72_1-debugsource-0:1-16.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • kpatch-patch-4_18_0-553_85_1-0:1-14.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • +6 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 Workaround: To mitigate this vulnerability, prevent the `rdma_rxe` kernel module from loading. Create a file `/etc/modprobe.d/blacklist-rdma_rxe.conf` with `blacklist rdma_rxe`. Regenerate the initramfs using `sudo dracut -f -v` (or `sudo mkinitrd -f -v /boot/initramfs-$(uname -r).img $(uname -r)` for older systems) and reboot. This action may impact functionality dependent on the RDMA/rxe driver. Workaround: To mitigate this issue, prevent the `vmw_pvrdma` kernel module from loading. Create a file named `/etc/modprobe.d/disable-vmw_pvrdma.conf` with the following content: `install vmw_pvrdma /bin/true`. A system reboot is required for this change to take effect. Disabling this module may impact functionality if VMware paravirtual RDMA devices are actively used. Workaround: To mitigate this issue, disable the `ipv6` kernel module at boot using the kernel command-line parameter: ``` grubby --update-kernel=ALL --args="ipv6.disable=1" ``` A reboot is required for this change to take effect. To verify after reboot: ``` cat /proc/cmdline | grep -o ipv6.disable=1 sysctl net.ipv6.conf.all.disable_ipv6 ``` Applications or services that rely on the IPv6 protocol cannot use this mitigation and should prioritize applying the fix.

🔗 References (7)