RHSA-2026:72831HighCVSS 7.8

Red Hat Security Advisory: kpatch-patch-6_12_0-211_16_1 and kpatch-patch-6_12_0-211_49_1 security update

Published
October 2, 2026
Last Modified
October 29, 2026

🔗 CVE IDs covered (3)

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

📋 Description

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 products13

  • Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_16_1-0:1-9.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_16_1-0:1-9.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_16_1-0:1-9.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_16_1-debuginfo-0:1-9.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_16_1-debuginfo-0:1-9.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_16_1-debugsource-0:1-9.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_49_1-0:1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_49_1-0:1-1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_49_1-0:1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_49_1-debuginfo-0:1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_49_1-debuginfo-0:1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kpatch-patch-6_12_0-211_49_1-debugsource-0:1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)

✅ 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 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 (6)