Issued:

2021-08-10

Updated:

2021-08-10

RHSA-2021:3044 - Important: kpatch-patch security update

Synopsis

Important: kpatch-patch security update

Type/Severity

Security Advisory Important

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.

Security Fix(es):

• kernel: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)

• kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)

• kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

Updated Packages

• kpatch-patch-4_18_0-305_10_2-1-1.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305-1-4.el8.src.rpm
• kpatch-patch-4_18_0-305_10_2-debugsource-1-1.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305_3_1-debuginfo-1-3.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305-1-4.el8.ppc64le.rpm
• kpatch-patch-4_18_0-305_10_2-debuginfo-1-1.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305_7_1-1-2.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305-debuginfo-1-4.el8.x86_64.rpm
• kpatch-patch-4_18_0-305_10_2-1-1.el8_4.src.rpm
• kpatch-patch-4_18_0-305_7_1-1-2.el8_4.src.rpm
• kpatch-patch-4_18_0-305-1-4.el8.x86_64.rpm
• kpatch-patch-4_18_0-305-debugsource-1-4.el8.ppc64le.rpm
• kpatch-patch-4_18_0-305_7_1-1-2.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305_3_1-1-3.el8_4.src.rpm
• kpatch-patch-4_18_0-305_7_1-debuginfo-1-2.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305_3_1-1-3.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305_7_1-debuginfo-1-2.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305_3_1-1-3.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305_3_1-debuginfo-1-3.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305_7_1-debugsource-1-2.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305_10_2-debugsource-1-1.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305-debuginfo-1-4.el8.ppc64le.rpm
• kpatch-patch-4_18_0-305_10_2-debuginfo-1-1.el8_4.ppc64le.rpm
• kpatch-patch-4_18_0-305_7_1-debugsource-1-2.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305-debugsource-1-4.el8.x86_64.rpm
• kpatch-patch-4_18_0-305_10_2-1-1.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305_3_1-debugsource-1-3.el8_4.x86_64.rpm
• kpatch-patch-4_18_0-305_3_1-debugsource-1-3.el8_4.ppc64le.rpm

Fixes

• This content is not included.BZ - 1965461
• This content is not included.BZ - 1971651
• This content is not included.BZ - 1980101

CVEs

• CVE-2021-3609
• CVE-2021-22543
• CVE-2021-22555

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.