What is RHSA-2021:0189?

RHSA-2021:0189 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: kpatch-patch security update

Which CVE IDs does RHSA-2021:0189 cover?

RHSA-2021:0189 covers the following CVE IDs: CVE-2020-25211. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2021:0189?

RHSA-2021:0189 has a CVSS v3 base score of 6.7, published by Red Hat Product Security.

Which products are affected by RHSA-2021:0189?

RHSA-2021:0189 affects 49 products, including: Red Hat Enterprise Linux BaseOS EUS (v. 8.1); kpatch-patch-4_18_0-147_13_2-0:1-6.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1); kpatch-patch-4_18_0-147_13_2-0:1-6.el8_1.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1); kpatch-patch-4_18_0-147_13_2-0:1-6.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1); kpatch-patch-4_18_0-147_13_2-debuginfo-0:1-6.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1); and others — see the full list on the advisory page.

RHSA-2021:0189HighCVSS 6.7

Red Hat Security Advisory: kpatch-patch security update

Vendor

Red Hat Product Security

Published

January 19, 2021

Last Modified

November 5, 2026

🔗 CVE IDs covered (1)

CVE-2020-25211 →

📋 Description

CVE-2020-25211 — kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c

🎯 Affected products49

Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-0:1-6.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-0:1-6.el8_1.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-0:1-6.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-debuginfo-0:1-6.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-debuginfo-0:1-6.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-debugsource-0:1-6.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_13_2-debugsource-0:1-6.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-0:1-5.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-0:1-5.el8_1.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-0:1-5.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-debuginfo-0:1-5.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-debuginfo-0:1-5.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-debugsource-0:1-5.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_20_1-debugsource-0:1-5.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-0:1-3.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-0:1-3.el8_1.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-0:1-3.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-debuginfo-0:1-3.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-debuginfo-0:1-3.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-debugsource-0:1-3.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_24_2-debugsource-0:1-3.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-0:1-3.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-0:1-3.el8_1.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-0:1-3.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-debuginfo-0:1-3.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-debuginfo-0:1-3.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-debugsource-0:1-3.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_27_1-debugsource-0:1-3.el8_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
kpatch-patch-4_18_0-147_32_1-0:1-1.el8_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 8.1)
+19 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 issue, prevent module nf_conntrack_netlink from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Alternatively, if nf_conntrack_netlink is being used, on Red Hat Enterprise Linux 8, you can disable unprivileged user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products49

✅ Remediation

🔗 References (4)